diff --git a/shared/src/bxdfs/layered.rs b/shared/src/bxdfs/layered.rs
index 4e7b588..d975b2e 100644
--- a/shared/src/bxdfs/layered.rs
+++ b/shared/src/bxdfs/layered.rs
@@ -19,7 +19,7 @@ use crate::spectra::{
     N_SPECTRUM_SAMPLES, RGBColorSpace, RGBUnboundedSpectrum, SampledSpectrum, SampledWavelengths,
     StandardColorSpaces,
 };
-use crate::utils::Ptr;
+use crate::utils::DevicePtr;
 use crate::utils::hash::hash_buffer;
 use crate::utils::math::{
     clamp, fast_exp, i0, lerp, log_i0, radians, safe_acos, safe_asin, safe_sqrt, sample_discrete,
diff --git a/shared/src/bxdfs/measured.rs b/shared/src/bxdfs/measured.rs
index 810e018..8b733f9 100644
--- a/shared/src/bxdfs/measured.rs
+++ b/shared/src/bxdfs/measured.rs
@@ -8,7 +8,7 @@ use crate::core::geometry::{
 use crate::core::scattering::reflect;
 use crate::spectra::{SampledSpectrum, SampledWavelengths};
 use crate::utils::math::square;
-use crate::utils::ptr::{Ptr, Slice};
+use crate::utils::ptr::{DevicePtr, Slice};
 use crate::utils::sampling::{PiecewiseLinear2D, cosine_hemisphere_pdf, sample_cosine_hemisphere};
 use crate::{Float, INV_PI, PI, PI_OVER_2};
 use core::any::Any;
@@ -28,7 +28,7 @@ pub struct MeasuredBxDFData {
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]
 pub struct MeasuredBxDF {
-    pub brdf: Ptr<MeasuredBxDFData>,
+    pub brdf: DevicePtr<MeasuredBxDFData>,
     pub lambda: SampledWavelengths,
 }
 
@@ -38,7 +38,7 @@ unsafe impl Sync for MeasuredBxDF {}
 impl MeasuredBxDF {
     pub fn new(brdf: &MeasuredBxDFData, lambda: &SampledWavelengths) -> Self {
         Self {
-            brdf: Ptr::from(brdf),
+            brdf: DevicePtr::from(brdf),
             lambda: *lambda,
         }
     }
diff --git a/shared/src/cameras/realistic.rs b/shared/src/cameras/realistic.rs
index b4ba93e..9d41912 100644
--- a/shared/src/cameras/realistic.rs
+++ b/shared/src/cameras/realistic.rs
@@ -5,7 +5,7 @@ use crate::core::film::Film;
 use crate::core::geometry::{
     Bounds2f, Normal3f, Point2f, Point2i, Point3f, Ray, Vector2f, Vector2i, Vector3f, VectorLike,
 };
-use crate::core::image::{Image, PixelFormat};
+use crate::core::image::{DeviceImage, PixelFormat};
 use crate::core::medium::Medium;
 use crate::core::pbrt::Float;
 use crate::core::sampler::CameraSample;
@@ -37,7 +37,7 @@ pub struct RealisticCamera {
     base: CameraBase,
     focus_distance: Float,
     set_aperture_diameter: Float,
-    aperture_image: *const Image,
+    aperture_image: *const DeviceImage,
     element_interfaces: *const LensElementInterface,
     n_elements: usize,
     physical_extent: Bounds2f,
@@ -51,7 +51,7 @@ impl RealisticCamera {
         lens_params: &[Float],
         focus_distance: Float,
         set_aperture_diameter: Float,
-        aperture_image: Option<Image>,
+        aperture_image: Option<DeviceImage>,
     ) -> Self {
         let film_ptr = base.film;
         if film_ptr.is_null() {
diff --git a/shared/src/core/bsdf.rs b/shared/src/core/bsdf.rs
index a40f9e9..470c0d8 100644
--- a/shared/src/core/bsdf.rs
+++ b/shared/src/core/bsdf.rs
@@ -2,17 +2,17 @@ use crate::Float;
 use crate::core::bxdf::{BSDFSample, BxDF, BxDFFlags, BxDFTrait, FArgs, TransportMode};
 use crate::core::geometry::{Frame, Normal3f, Point2f, Vector3f, VectorLike};
 use crate::spectra::SampledSpectrum;
-use crate::utils::Ptr;
+use crate::utils::DevicePtr;
 
 #[repr(C)]
 #[derive(Copy, Debug, Default)]
 pub struct BSDF {
-    bxdf: Ptr<BxDF>,
+    bxdf: DevicePtr<BxDF>,
     shading_frame: Frame,
 }
 
 impl BSDF {
-    pub fn new(ns: Normal3f, dpdus: Vector3f, bxdf: Ptr<BxDF>) -> Self {
+    pub fn new(ns: Normal3f, dpdus: Vector3f, bxdf: DevicePtr<BxDF>) -> Self {
         Self {
             bxdf,
             shading_frame: Frame::new(dpdus.normalize(), Vector3f::from(ns)),
diff --git a/shared/src/core/bssrdf.rs b/shared/src/core/bssrdf.rs
index dece5c7..25c249b 100644
--- a/shared/src/core/bssrdf.rs
+++ b/shared/src/core/bssrdf.rs
@@ -3,10 +3,10 @@ use crate::core::geometry::{Frame, Normal3f, Point2f, Point3f, Point3fi, Vector3
 use crate::core::interaction::{InteractionBase, ShadingGeom, SurfaceInteraction};
 use crate::core::shape::Shape;
 use crate::spectra::{N_SPECTRUM_SAMPLES, SampledSpectrum};
-use crate::utils::ArenaPtr;
+use crate::utils::Ptr;
 use crate::utils::math::{catmull_rom_weights, square};
 use crate::utils::sampling::sample_catmull_rom_2d;
-use crate::utils::{Ptr, ptr::Slice};
+use crate::utils::{DevicePtr, ptr::Slice};
 use crate::{Float, PI};
 use enum_dispatch::enum_dispatch;
 use std::sync::Arc;
@@ -78,15 +78,15 @@ impl From<&SubsurfaceInteraction> for SurfaceInteraction {
                 dndv: Normal3f::zero(),
             },
             face_index: 0,
-            area_light: Ptr::null(),
-            material: Ptr::null(),
+            area_light: DevicePtr::null(),
+            material: DevicePtr::null(),
             dpdx: Vector3f::zero(),
             dpdy: Vector3f::zero(),
             dudx: 0.,
             dvdx: 0.,
             dudy: 0.,
             dvdy: 0.,
-            shape: Ptr::from(&Shape::default()),
+            shape: DevicePtr::from(&Shape::default()),
         }
     }
 }
@@ -96,11 +96,11 @@ impl From<&SubsurfaceInteraction> for SurfaceInteraction {
 pub struct BSSRDFTable {
     pub n_rho_samples: u32,
     pub n_radius_samples: u32,
-    pub rho_samples: Ptr<Float>,
-    pub radius_samples: Ptr<Float>,
-    pub profile: Ptr<Float>,
-    pub rho_eff: Ptr<Float>,
-    pub profile_cdf: Ptr<Float>,
+    pub rho_samples: DevicePtr<Float>,
+    pub radius_samples: DevicePtr<Float>,
+    pub profile: DevicePtr<Float>,
+    pub rho_eff: DevicePtr<Float>,
+    pub profile_cdf: DevicePtr<Float>,
 }
 
 impl BSSRDFTable {
@@ -165,7 +165,7 @@ pub struct TabulatedBSSRDF {
     eta: Float,
     sigma_t: SampledSpectrum,
     rho: SampledSpectrum,
-    table: Ptr<BSSRDFTable>,
+    table: DevicePtr<BSSRDFTable>,
 }
 
 impl TabulatedBSSRDF {
@@ -187,7 +187,7 @@ impl TabulatedBSSRDF {
             eta,
             sigma_t,
             rho,
-            table: Ptr::from(table),
+            table: DevicePtr::from(table),
         }
     }
 
diff --git a/shared/src/core/camera.rs b/shared/src/core/camera.rs
index 1d38548..4c1b019 100644
--- a/shared/src/core/camera.rs
+++ b/shared/src/core/camera.rs
@@ -10,7 +10,7 @@ use crate::core::pbrt::Float;
 use crate::core::sampler::CameraSample;
 use crate::spectra::{SampledSpectrum, SampledWavelengths};
 use crate::utils::math::lerp;
-use crate::utils::ptr::Ptr;
+use crate::utils::ptr::DevicePtr;
 use crate::utils::transform::{AnimatedTransform, Transform};
 
 use enum_dispatch::enum_dispatch;
@@ -113,8 +113,8 @@ pub struct CameraBase {
     pub min_pos_differential_y: Vector3f,
     pub min_dir_differential_x: Vector3f,
     pub min_dir_differential_y: Vector3f,
-    pub film: Ptr<Film>,
-    pub medium: Ptr<Medium>,
+    pub film: DevicePtr<Film>,
+    pub medium: DevicePtr<Medium>,
 }
 
 #[enum_dispatch(CameraTrait)]
@@ -232,13 +232,13 @@ pub trait CameraTrait {
             Point3f::new(0., 0., 0.) + self.base().min_pos_differential_x,
             Vector3f::new(0., 0., 1.) + self.base().min_dir_differential_x,
             None,
-            &Ptr::default(),
+            &DevicePtr::default(),
         );
         let y_ray = Ray::new(
             Point3f::new(0., 0., 0.) + self.base().min_pos_differential_y,
             Vector3f::new(0., 0., 1.) + self.base().min_dir_differential_y,
             None,
-            &Ptr::default(),
+            &DevicePtr::default(),
         );
         let n_down = Vector3f::from(n_down_z);
         let tx = -(n_down.dot(y_ray.o.into())) / n_down.dot(x_ray.d);
diff --git a/shared/src/core/film.rs b/shared/src/core/film.rs
index 555809d..790647b 100644
--- a/shared/src/core/film.rs
+++ b/shared/src/core/film.rs
@@ -5,7 +5,7 @@ use crate::core::geometry::{
     Bounds2f, Bounds2fi, Bounds2i, Normal3f, Point2f, Point2i, Point3f, Tuple, Vector2f, Vector2fi,
     Vector2i, Vector3f,
 };
-use crate::core::image::{Image, PixelFormat};
+use crate::core::image::{DeviceImage, PixelFormat};
 use crate::core::interaction::SurfaceInteraction;
 use crate::core::pbrt::Float;
 use crate::core::spectrum::{Spectrum, SpectrumTrait, StandardSpectra};
@@ -17,7 +17,7 @@ use crate::utils::AtomicFloat;
 use crate::utils::containers::Array2D;
 use crate::utils::math::linear_least_squares;
 use crate::utils::math::{SquareMatrix, wrap_equal_area_square};
-use crate::utils::ptr::Ptr;
+use crate::utils::ptr::DevicePtr;
 use crate::utils::sampling::VarianceEstimator;
 use crate::utils::transform::AnimatedTransform;
 
@@ -472,7 +472,7 @@ impl PixelSensor {
 
     pub fn new_with_white_balance(
         output_colorspace: &RGBColorSpace,
-        sensor_illum: Ptr<Spectrum>,
+        sensor_illum: DevicePtr<Spectrum>,
         imaging_ratio: Float,
         spectra: *const StandardSpectra,
     ) -> Self {
diff --git a/shared/src/core/filter.rs b/shared/src/core/filter.rs
index 46125d9..4d97c14 100644
--- a/shared/src/core/filter.rs
+++ b/shared/src/core/filter.rs
@@ -3,7 +3,7 @@ use crate::core::pbrt::Float;
 use crate::filters::*;
 use crate::utils::containers::Array2D;
 use crate::utils::math::{gaussian, gaussian_integral, lerp, sample_tent, windowed_sinc};
-use crate::utils::sampling::PiecewiseConstant2D;
+use crate::utils::sampling::DevicePiecewiseConstant2D;
 use enum_dispatch::enum_dispatch;
 
 pub struct FilterSample {
@@ -15,7 +15,7 @@ pub struct FilterSample {
 #[derive(Clone, Debug, Copy)]
 pub struct FilterSampler {
     pub domain: Bounds2f,
-    pub distrib: PiecewiseConstant2D,
+    pub distrib: DevicePiecewiseConstant2D,
     pub f: Array2D<Float>,
 }
 
@@ -43,7 +43,7 @@ impl FilterSampler {
                 f[(x as i32, y as i32)] = func(p);
             }
         }
-        let distrib = PiecewiseConstant2D::new_with_bounds(&f, domain);
+        let distrib = DevicePiecewiseConstant2D::new_with_bounds(&f, domain);
         Self { domain, f, distrib }
     }
 
diff --git a/shared/src/core/geometry/ray.rs b/shared/src/core/geometry/ray.rs
index 1daf9c0..d51b97e 100644
--- a/shared/src/core/geometry/ray.rs
+++ b/shared/src/core/geometry/ray.rs
@@ -2,7 +2,7 @@ use super::{Normal3f, Point3f, Point3fi, Vector3f, VectorLike};
 use crate::core::medium::Medium;
 use crate::core::pbrt::Float;
 use crate::utils::math::{next_float_down, next_float_up};
-use crate::utils::ptr::Ptr;
+use crate::utils::ptr::DevicePtr;
 
 #[repr(C)]
 #[derive(Clone, Copy, Debug)]
@@ -10,7 +10,7 @@ pub struct Ray {
     pub o: Point3f,
     pub d: Vector3f,
     pub time: Float,
-    pub medium: Ptr<Medium>,
+    pub medium: DevicePtr<Medium>,
     // We do this instead of creating a trait for Rayable or some gnarly thing like that
     pub has_differentials: bool,
     pub differential: RayDifferential,
@@ -21,7 +21,7 @@ impl Default for Ray {
         Self {
             o: Point3f::new(0.0, 0.0, 0.0),
             d: Vector3f::new(0.0, 0.0, 0.0),
-            medium: Ptr::null(),
+            medium: DevicePtr::null(),
             time: 0.0,
             has_differentials: false,
             differential: RayDifferential::default(),
@@ -35,7 +35,7 @@ impl Ray {
             o,
             d,
             time: time.unwrap_or_else(|| Self::default().time),
-            medium: Ptr::from(medium),
+            medium: DevicePtr::from(medium),
             ..Self::default()
         }
     }
@@ -71,7 +71,7 @@ impl Ray {
             o: origin,
             d,
             time,
-            medium: Ptr::null(),
+            medium: DevicePtr::null(),
             has_differentials: false,
             differential: RayDifferential::default(),
         }
@@ -99,7 +99,7 @@ impl Ray {
             o: pf,
             d,
             time,
-            medium: Ptr::null(),
+            medium: DevicePtr::null(),
             has_differentials: false,
             differential: RayDifferential::default(),
         }
diff --git a/shared/src/core/image.rs b/shared/src/core/image.rs
index cb15801..8185ad7 100644
--- a/shared/src/core/image.rs
+++ b/shared/src/core/image.rs
@@ -66,87 +66,75 @@ pub enum Pixels {
 }
 
 #[repr(C)]
-#[derive(Debug, Clone, Copy)]
-pub struct Image {
+#[derive(Clone, Copy, Debug)]
+pub struct ImageBase {
     pub format: PixelFormat,
-    pub pixels: Pixels,
     pub encoding: ColorEncoding,
     pub resolution: Point2i,
     pub n_channels: i32,
 }
 
-impl Image {
-    pub fn resolution(&self) -> Point2i {
-        self.resolution
-    }
-
-    pub fn is_valid(&self) -> bool {
-        self.resolution.x() > 0. && self.resolution.y() > 0.
-    }
-
-    pub fn format(&self) -> PixelFormat {
-        self.format
-    }
-
-    pub fn n_channels(&self) -> i32 {
-        self.n_channels
-    }
-
-    pub fn pixel_offset(&self, p: Point2i) -> u32 {
-        let width = self.resolution.x() as u32;
-        let idx = p.y() as u32 * width + p.x() as u32;
-        idx * (self.n_channels as u32)
-    }
-
-    pub fn get_channel_with_wrap(&self, p: Point2i, c: i32, wrap_mode: WrapMode2D) -> Float {
-        if !self.remap_pixel_coords(&mut p, wrap_mode) {
-            return 0.;
-        }
-
-        let offset = self.pixel_offset(p) + c;
-        unsafe {
-            match self.pixels {
-                Pixels::U8(ptr) => {
-                    let raw_u8 = *ptr.add(offset);
-                    self.encoding.to_linear_scalar(raw_u8)
-                }
-                Pixels::F16(ptr) => {
-                    let half_bits = *ptr.add(offset);
-                    f16_to_f32(f16::from_bits(half_bits))
-                }
-                Pixels::F32(ptr) => *ptr.add(offset),
-            }
-        }
-    }
-
-    pub fn get_channel(&self, p: Point2i, c: i32) -> Float {
-        self.get_channel_with_wrap(p, c, WrapMode::Clamp.into())
-    }
-
+impl ImageBase {
     pub fn remap_pixel_coords(&self, p: &mut Point2i, wrap_mode: WrapMode2D) -> bool {
+        let resolution = self.resolution;
         for i in 0..2 {
-            if p[i] >= 0 && p[i] < self.resolution[i] {
+            if p[i] >= 0 && p[i] < resolution[i] {
                 continue;
             }
             match wrap_mode.uv[i] {
                 WrapMode::Black => return false,
-                WrapMode::Clamp => p[i] = p[i].clamp(0, self.resolution[i] - 1),
-                WrapMode::Repeat => p[i] = p[i].rem_euclid(self.resolution[i]),
+                WrapMode::Clamp => p[i] = p[i].clamp(0, resolution[i] - 1),
+                WrapMode::Repeat => p[i] = p[i].rem_euclid(resolution[i]),
                 WrapMode::OctahedralSphere => {
-                    p[i] = p[i].clamp(0, self.resolution[i] - 1);
+                    p[i] = p[i].clamp(0, resolution[i] - 1);
                 }
             }
         }
         true
     }
+}
+
+#[repr(C)]
+#[derive(Debug, Clone, Copy)]
+pub struct DeviceImage {
+    pub base: ImageBase,
+    pub pixels: Pixels,
+}
+
+impl DeviceImage {
+    pub fn base(&self) -> ImageBase {
+        self.base
+    }
+
+    pub fn resolution(&self) -> Point2i {
+        self.base.resolution
+    }
+
+    pub fn is_valid(&self) -> bool {
+        self.resolution().x() > 0 && self.resolution().y() > 0
+    }
+
+    pub fn format(&self) -> PixelFormat {
+        self.base().format
+    }
+
+    pub fn n_channels(&self) -> i32 {
+        self.base().n_channels
+    }
+
+    pub fn pixel_offset(&self, p: Point2i) -> u32 {
+        let width = self.resolution().x() as u32;
+        let idx = p.y() as u32 * width + p.x() as u32;
+        idx * (self.n_channels() as u32)
+    }
 
     pub fn bilerp_channel(&self, p: Point2f, c: i32) -> Float {
         self.bilerp_channel_with_wrap(p, c, WrapMode::Clamp.into())
     }
 
     pub fn bilerp_channel_with_wrap(&self, p: Point2f, c: i32, wrap_mode: WrapMode2D) -> Float {
-        let x = p.x() * self.resolution.x() as Float - 0.5;
-        let y = p.y() * self.resolution.y() as Float - 0.5;
+        let x = p.x() * self.resolution().x() as Float - 0.5;
+        let y = p.y() * self.resolution().y() as Float - 0.5;
         let xi = x.floor() as i32;
         let yi = y.floor() as i32;
         let dx = x - xi as Float;
@@ -157,22 +145,51 @@ impl Image {
         let v11 = self.get_channel_with_wrap(Point2i::new(xi + 1, yi + 1), c, wrap_mode);
         lerp(dy, lerp(dx, v00, v10), lerp(dx, v01, v11))
     }
+}
 
-    pub fn lookup_nearest_channel_with_wrap(
-        &self,
-        p: Point2f,
-        c: i32,
-        wrap_mode: WrapMode2D,
-    ) -> Float {
+pub trait ImageAccess {
+    fn get_channel_with_wrap(&self, p: Point2i, c: i32, wrap_mode: WrapMode2D) -> Float;
+    fn get_channel(&self, p: Point2i, c: i32) -> Float;
+    fn lookup_nearest_channel_with_wrap(&self, p: Point2f, c: i32, wrap_mode: WrapMode2D) -> Float;
+    fn lookup_nearest_channel(&self, p: Point2f, c: i32) -> Float;
+}
+
+impl ImageAccess for DeviceImage {
+    fn get_channel_with_wrap(&self, mut p: Point2i, c: i32, wrap_mode: WrapMode2D) -> Float {
+        if !self.base.remap_pixel_coords(&mut p, wrap_mode) {
+            return 0.;
+        }
+
+        let offset = self.pixel_offset(p) + c as u32;
+        unsafe {
+            match self.pixels {
+                Pixels::U8(ptr) => {
+                    let raw_u8 = *ptr.add(offset as usize);
+                    self.base().encoding.to_linear_scalar(raw_u8)
+                }
+                Pixels::F16(ptr) => {
+                    let half_bits: u16 = *ptr.add(offset as usize) as u16;
+                    f16_to_f32(half_bits)
+                }
+                Pixels::F32(ptr) => *ptr.add(offset as usize),
+            }
+        }
+    }
+
+    fn get_channel(&self, p: Point2i, c: i32) -> Float {
+        self.get_channel_with_wrap(p, c, WrapMode::Clamp.into())
+    }
+
+    fn lookup_nearest_channel_with_wrap(&self, p: Point2f, c: i32, wrap_mode: WrapMode2D) -> Float {
         let pi = Point2i::new(
-            p.x() as i32 * self.resolution.x(),
-            p.y() as i32 * self.resolution.y(),
+            p.x() as i32 * self.resolution().x(),
+            p.y() as i32 * self.resolution().y(),
         );
 
         self.get_channel_with_wrap(pi, c, wrap_mode)
     }
 
-    pub fn lookup_nearest_channel(&self, p: Point2f, c: i32) -> Float {
+    fn lookup_nearest_channel(&self, p: Point2f, c: i32) -> Float {
         self.lookup_nearest_channel_with_wrap(p, c, WrapMode::Clamp.into())
     }
 }
diff --git a/shared/src/core/interaction.rs b/shared/src/core/interaction.rs
index 830cc7c..eb438c9 100644
--- a/shared/src/core/interaction.rs
+++ b/shared/src/core/interaction.rs
@@ -5,7 +5,7 @@ use crate::core::camera::{Camera, CameraTrait};
 use crate::core::geometry::{
     Normal3f, Point2f, Point3f, Point3fi, Ray, RayDifferential, Vector3f, VectorLike,
 };
-use crate::core::image::Image;
+use crate::core::image::DeviceImage;
 use crate::core::light::{Light, LightTrait};
 use crate::core::material::{
     Material, MaterialEvalContext, MaterialTrait, NormalBumpEvalContext, bump_map, normal_map,
@@ -16,7 +16,7 @@ use crate::core::sampler::{Sampler, SamplerTrait};
 use crate::core::shape::Shape;
 use crate::core::texture::{GPUFloatTexture, UniversalTextureEvaluator};
 use crate::spectra::{SampledSpectrum, SampledWavelengths};
-use crate::utils::Ptr;
+use crate::utils::DevicePtr;
 use crate::utils::math::{clamp, difference_of_products, square};
 use enum_dispatch::enum_dispatch;
 use std::any::Any;
@@ -31,7 +31,7 @@ pub struct InteractionBase {
     pub wo: Vector3f,
     pub uv: Point2f,
     pub medium_interface: MediumInterface,
-    pub medium: Ptr<Medium>,
+    pub medium: DevicePtr<Medium>,
 }
 
 impl InteractionBase {
@@ -49,11 +49,11 @@ impl InteractionBase {
             wo: wo.normalize(),
             time,
             medium_interface: MediumInterface::default(),
-            medium: Ptr::null(),
+            medium: DevicePtr::null(),
         }
     }
 
-    pub fn new_medium(p: Point3f, wo: Vector3f, time: Float, medium: Ptr<Medium>) -> Self {
+    pub fn new_medium(p: Point3f, wo: Vector3f, time: Float, medium: DevicePtr<Medium>) -> Self {
         Self {
             pi: Point3fi::new_from_point(p),
             n: Normal3f::zero(),
@@ -114,7 +114,7 @@ pub trait InteractionTrait {
         false
     }
 
-    fn get_medium(&self, w: Vector3f) -> Ptr<Medium> {
+    fn get_medium(&self, w: Vector3f) -> DevicePtr<Medium> {
         let data = self.get_common();
         if !data.medium_interface.inside.is_null() || !data.medium_interface.outside.is_null() {
             if w.dot(data.n.into()) > 0.0 {
@@ -225,9 +225,9 @@ pub struct SurfaceInteraction {
     pub dndv: Normal3f,
     pub shading: ShadingGeom,
     pub face_index: u32,
-    pub area_light: Ptr<Light>,
-    pub material: Ptr<Material>,
-    pub shape: Ptr<Shape>,
+    pub area_light: DevicePtr<Light>,
+    pub material: DevicePtr<Material>,
+    pub shape: DevicePtr<Shape>,
     pub dpdx: Vector3f,
     pub dpdy: Vector3f,
     pub dudx: Float,
@@ -412,8 +412,8 @@ impl SurfaceInteraction {
     fn compute_bump_geom(
         &mut self,
         tex_eval: &UniversalTextureEvaluator,
-        displacement: Ptr<GPUFloatTexture>,
-        normal_image: Ptr<Image>,
+        displacement: DevicePtr<GPUFloatTexture>,
+        normal_image: DevicePtr<DeviceImage>,
     ) {
         let ctx = NormalBumpEvalContext::from(&*self);
         let (dpdu, dpdv) = if !displacement.is_null() {
@@ -536,7 +536,7 @@ impl InteractionTrait for SurfaceInteraction {
         &mut self.common
     }
 
-    fn get_medium(&self, w: Vector3f) -> Ptr<Medium> {
+    fn get_medium(&self, w: Vector3f) -> DevicePtr<Medium> {
         let interface = self.common.medium_interface;
         if self.n().dot(w.into()) > 0.0 {
             interface.outside
@@ -583,16 +583,16 @@ impl SurfaceInteraction {
                 dndu,
                 dndv,
             },
-            material: Ptr::null(),
+            material: DevicePtr::null(),
             face_index: 0,
-            area_light: Ptr::null(),
+            area_light: DevicePtr::null(),
             dpdx: Vector3f::zero(),
             dpdy: Vector3f::zero(),
             dudx: 0.0,
             dudy: 0.0,
             dvdx: 0.0,
             dvdy: 0.0,
-            shape: Ptr::null(),
+            shape: DevicePtr::null(),
         }
     }
 
@@ -658,13 +658,13 @@ impl SurfaceInteraction {
         ray_medium: &Medium,
         prim_medium_interface: MediumInterface,
     ) {
-        self.material = Ptr::from(mtl);
-        self.area_light = Ptr::from(area);
+        self.material = DevicePtr::from(mtl);
+        self.area_light = DevicePtr::from(area);
 
         if prim_medium_interface.is_medium_transition() {
             self.common.medium_interface = prim_medium_interface;
         } else {
-            self.common.medium = Ptr::from(ray_medium);
+            self.common.medium = DevicePtr::from(ray_medium);
         }
     }
 }
@@ -681,7 +681,7 @@ impl MediumInteraction {
         p: Point3f,
         wo: Vector3f,
         time: Float,
-        medium: Ptr<Medium>,
+        medium: DevicePtr<Medium>,
         phase: PhaseFunction,
     ) -> Self {
         Self {
diff --git a/shared/src/core/light.rs b/shared/src/core/light.rs
index d7124a5..32089b0 100644
--- a/shared/src/core/light.rs
+++ b/shared/src/core/light.rs
@@ -3,7 +3,7 @@ use crate::core::geometry::{
     Bounds2f, Bounds3f, DirectionCone, Normal3f, Point2f, Point2i, Point3f, Point3fi, Ray,
     Vector3f, VectorLike, cos_theta,
 };
-use crate::core::image::Image;
+use crate::core::image::DeviceImage;
 use crate::core::interaction::{
     Interaction, InteractionBase, InteractionTrait, MediumInteraction, SimpleInteraction,
     SurfaceInteraction,
@@ -17,8 +17,8 @@ use crate::spectra::{
 };
 use crate::utils::Transform;
 use crate::utils::math::{equal_area_sphere_to_square, radians, safe_sqrt, smooth_step, square};
-use crate::utils::ptr::Ptr;
-use crate::utils::sampling::PiecewiseConstant2D;
+use crate::utils::ptr::{DevicePtr, Ptr};
+use crate::utils::sampling::DevicePiecewiseConstant2D;
 use crate::{Float, PI};
 use bitflags::bitflags;
 
diff --git a/shared/src/core/material.rs b/shared/src/core/material.rs
index 97038ee..93756e5 100644
--- a/shared/src/core/material.rs
+++ b/shared/src/core/material.rs
@@ -10,7 +10,7 @@ use crate::core::bsdf::BSDF;
 use crate::core::bssrdf::BSSRDF;
 use crate::core::bxdf::BxDF;
 use crate::core::geometry::{Frame, Normal3f, Point2f, Point3f, Vector2f, Vector3f, VectorLike};
-use crate::core::image::{Image, WrapMode, WrapMode2D};
+use crate::core::image::{DeviceImage, WrapMode, WrapMode2D};
 use crate::core::interaction::{Interaction, InteractionTrait, ShadingGeom, SurfaceInteraction};
 use crate::core::scattering::TrowbridgeReitzDistribution;
 use crate::core::spectrum::{Spectrum, SpectrumTrait};
@@ -19,7 +19,7 @@ use crate::core::texture::{
 };
 use crate::materials::*;
 use crate::spectra::{SampledSpectrum, SampledWavelengths};
-use crate::utils::Ptr;
+use crate::utils::DevicePtr;
 use crate::utils::hash::hash_float;
 use crate::utils::math::clamp;
 
@@ -103,7 +103,7 @@ impl From<&NormalBumpEvalContext> for TextureEvalContext {
     }
 }
 
-pub fn normal_map(normal_map: &Image, ctx: &NormalBumpEvalContext) -> (Vector3f, Vector3f) {
+pub fn normal_map(normal_map: &DeviceImage, ctx: &NormalBumpEvalContext) -> (Vector3f, Vector3f) {
     let wrap = WrapMode2D::from(WrapMode::Repeat);
     let uv = Point2f::new(ctx.uv[0], 1. - ctx.uv[1]);
     let r = normal_map.bilerp_channel_with_wrap(uv, 0, wrap);
@@ -125,7 +125,7 @@ pub fn bump_map<T: TextureEvaluator>(
     displacement: &GPUFloatTexture,
     ctx: &NormalBumpEvalContext,
 ) -> (Vector3f, Vector3f) {
-    debug_assert!(tex_eval.can_evaluate(&[Ptr::from(displacement)], &[]));
+    debug_assert!(tex_eval.can_evaluate(&[DevicePtr::from(displacement)], &[]));
     let mut du = 0.5 * (ctx.dudx.abs() + ctx.dudy.abs());
     if du == 0.0 {
         du = 0.0005;
@@ -173,8 +173,8 @@ pub trait MaterialTrait {
     ) -> Option<BSSRDF>;
 
     fn can_evaluate_textures(&self, tex_eval: &dyn TextureEvaluator) -> bool;
-    fn get_normal_map(&self) -> Option<&Image>;
-    fn get_displacement(&self) -> Ptr<GPUFloatTexture>;
+    fn get_normal_map(&self) -> Option<&DeviceImage>;
+    fn get_displacement(&self) -> DevicePtr<GPUFloatTexture>;
     fn has_subsurface_scattering(&self) -> bool;
 }
 
diff --git a/shared/src/core/medium.rs b/shared/src/core/medium.rs
index ae65585..f318a46 100644
--- a/shared/src/core/medium.rs
+++ b/shared/src/core/medium.rs
@@ -12,7 +12,7 @@ use crate::spectra::{
 };
 use crate::utils::containers::SampledGrid;
 use crate::utils::math::{clamp, square};
-use crate::utils::ptr::Ptr;
+use crate::utils::ptr::DevicePtr;
 use crate::utils::rng::Rng;
 use crate::utils::transform::Transform;
 
@@ -829,8 +829,8 @@ impl MediumTrait for NanoVDBMedium {
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]
 pub struct MediumInterface {
-    pub inside: Ptr<Medium>,
-    pub outside: Ptr<Medium>,
+    pub inside: DevicePtr<Medium>,
+    pub outside: DevicePtr<Medium>,
 }
 
 unsafe impl Send for MediumInterface {}
@@ -839,17 +839,32 @@ unsafe impl Sync for MediumInterface {}
 impl Default for MediumInterface {
     fn default() -> Self {
         Self {
-            inside: Ptr::null(),
-            outside: Ptr::null(),
+            inside: DevicePtr::null(),
+            outside: DevicePtr::null(),
         }
     }
 }
 
+impl From<Medium> for MediumInterface {
+    fn from(medium: Medium) -> Self {
+        Self {
+            inside: DevicePtr::from(&medium),
+            outside: DevicePtr::from(&medium),
+        }
+    }
+}
+
+impl From<&Medium> for MediumInterface {
+    fn from(medium: &Medium) -> Self {
+        Self::from(medium.clone())
+    }
+}
+
 impl MediumInterface {
     pub fn new(inside: &Medium, outside: &Medium) -> Self {
         Self {
-            inside: Ptr::from(inside),
-            outside: Ptr::from(outside),
+            inside: DevicePtr::from(inside),
+            outside: DevicePtr::from(outside),
         }
     }
 
diff --git a/shared/src/core/primitive.rs b/shared/src/core/primitive.rs
index d5da5bd..bfd1928 100644
--- a/shared/src/core/primitive.rs
+++ b/shared/src/core/primitive.rs
@@ -7,7 +7,7 @@ use crate::core::medium::{Medium, MediumInterface};
 use crate::core::pbrt::Float;
 use crate::core::shape::{Shape, ShapeIntersection, ShapeTrait};
 use crate::core::texture::{GPUFloatTexture, TextureEvalContext};
-use crate::utils::ArenaPtr;
+use crate::utils::Ptr;
 use crate::utils::hash::hash_float;
 use crate::utils::transform::{AnimatedTransform, Transform};
 
@@ -88,13 +88,13 @@ impl PrimitiveTrait for GeometricPrimitive {
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]
 pub struct SimplePrimitive {
-    shape: ArenaPtr<Shape>,
-    material: ArenaPtr<Material>,
+    shape: Ptr<Shape>,
+    material: Ptr<Material>,
 }
 
 #[derive(Debug, Clone)]
 pub struct TransformedPrimitive {
-    pub primitive: ArenaPtr<Primitive>,
+    pub primitive: Ptr<Primitive>,
     pub render_from_primitive: Transform,
 }
 
@@ -129,7 +129,7 @@ impl PrimitiveTrait for TransformedPrimitive {
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]
 pub struct AnimatedPrimitive {
-    primitive: ArenaPtr<Primitive>,
+    primitive: Ptr<Primitive>,
     render_from_primitive: AnimatedTransform,
 }
 
@@ -164,7 +164,7 @@ impl PrimitiveTrait for AnimatedPrimitive {
 #[derive(Debug, Clone, Copy)]
 pub struct BVHAggregatePrimitive {
     max_prims_in_node: u32,
-    primitives: *const ArenaPtr<Primitive>,
+    primitives: *const Ptr<Primitive>,
     nodes: *const LinearBVHNode,
 }
 
diff --git a/shared/src/core/sampler.rs b/shared/src/core/sampler.rs
index a2858b6..441fdb5 100644
--- a/shared/src/core/sampler.rs
+++ b/shared/src/core/sampler.rs
@@ -2,7 +2,7 @@ use crate::core::filter::FilterTrait;
 use crate::core::geometry::{Bounds2f, Point2f, Point2i, Vector2f};
 use crate::core::options::{PBRTOptions, get_options};
 use crate::core::pbrt::{Float, ONE_MINUS_EPSILON, PI, PI_OVER_2, PI_OVER_4, find_interval};
-use crate::utils::Ptr;
+use crate::utils::DevicePtr;
 use crate::utils::containers::Array2D;
 use crate::utils::math::{
     BinaryPermuteScrambler, DigitPermutation, FastOwenScrambler, NoRandomizer, OwenScrambler,
@@ -103,7 +103,7 @@ pub struct HaltonSampler {
     mult_inverse: [u64; 2],
     halton_index: u64,
     dim: u32,
-    digit_permutations: Ptr<DigitPermutation>,
+    digit_permutations: DevicePtr<DigitPermutation>,
 }
 
 impl HaltonSampler {
diff --git a/shared/src/core/shape.rs b/shared/src/core/shape.rs
index 8b173e5..ad60399 100644
--- a/shared/src/core/shape.rs
+++ b/shared/src/core/shape.rs
@@ -10,7 +10,7 @@ use crate::core::material::Material;
 use crate::core::medium::{Medium, MediumInterface};
 use crate::shapes::*;
 use crate::utils::math::{next_float_down, next_float_up};
-use crate::utils::{Ptr, Transform};
+use crate::utils::{DevicePtr, Transform};
 use crate::{Float, PI};
 use enum_dispatch::enum_dispatch;
 
@@ -118,7 +118,12 @@ impl ShapeSampleContext {
     }
 
     pub fn spawn_ray(&self, w: Vector3f) -> Ray {
-        Ray::new(self.offset_ray_origin(w), w, Some(self.time), &Ptr::null())
+        Ray::new(
+            self.offset_ray_origin(w),
+            w,
+            Some(self.time),
+            &DevicePtr::null(),
+        )
     }
 }
 
diff --git a/shared/src/core/texture.rs b/shared/src/core/texture.rs
index a0798dd..11e9076 100644
--- a/shared/src/core/texture.rs
+++ b/shared/src/core/texture.rs
@@ -9,7 +9,7 @@ use crate::spectra::{
     SampledWavelengths,
 };
 use crate::textures::*;
-use crate::utils::Ptr;
+use crate::utils::DevicePtr;
 use crate::utils::Transform;
 use crate::utils::math::square;
 use crate::{Float, INV_2_PI, INV_PI, PI};
@@ -428,8 +428,8 @@ pub trait TextureEvaluator: Send + Sync {
 
     fn can_evaluate(
         &self,
-        _ftex: &[Ptr<GPUFloatTexture>],
-        _stex: &[Ptr<GPUSpectrumTexture>],
+        _ftex: &[DevicePtr<GPUFloatTexture>],
+        _stex: &[DevicePtr<GPUSpectrumTexture>],
     ) -> bool;
 }
 
@@ -453,8 +453,8 @@ impl TextureEvaluator for UniversalTextureEvaluator {
 
     fn can_evaluate(
         &self,
-        _float_textures: &[Ptr<GPUFloatTexture>],
-        _spectrum_textures: &[Ptr<GPUSpectrumTexture>],
+        _float_textures: &[DevicePtr<GPUFloatTexture>],
+        _spectrum_textures: &[DevicePtr<GPUSpectrumTexture>],
     ) -> bool {
         true
     }
diff --git a/shared/src/lights/diffuse.rs b/shared/src/lights/diffuse.rs
index ee1c75b..8dfcc1f 100644
--- a/shared/src/lights/diffuse.rs
+++ b/shared/src/lights/diffuse.rs
@@ -1,7 +1,7 @@
 use crate::PI;
 use crate::core::color::{RGB, XYZ};
 use crate::core::geometry::*;
-use crate::core::image::Image;
+use crate::core::image::{DeviceImage, ImageAccess};
 use crate::core::interaction::{
     Interaction, InteractionTrait, MediumInteraction, SurfaceInteraction,
 };
@@ -17,17 +17,17 @@ use crate::core::texture::{
 };
 use crate::spectra::*;
 use crate::utils::hash::hash_float;
-use crate::utils::{Ptr, Transform};
+use crate::utils::{DevicePtr, Transform};
 
 #[repr(C)]
 #[derive(Clone, Debug, Copy)]
 pub struct DiffuseAreaLight {
     pub base: LightBase,
-    pub shape: Ptr<Shape>,
-    pub alpha: Ptr<GPUFloatTexture>,
-    pub image_color_space: Ptr<RGBColorSpace>,
-    pub lemit: Ptr<DenselySampledSpectrum>,
-    pub image: Ptr<Image>,
+    pub shape: DevicePtr<Shape>,
+    pub alpha: DevicePtr<GPUFloatTexture>,
+    pub image_color_space: DevicePtr<RGBColorSpace>,
+    pub lemit: DevicePtr<DenselySampledSpectrum>,
+    pub image: DevicePtr<DeviceImage>,
     pub area: Float,
     pub two_sided: bool,
     pub scale: Float,
@@ -175,8 +175,8 @@ impl LightTrait for DiffuseAreaLight {
     fn bounds(&self) -> Option<LightBounds> {
         let mut phi = 0.;
         if !self.image.is_null() {
-            for y in 0..self.image.resolution.y() {
-                for x in 0..self.image.resolution.x() {
+            for y in 0..self.image.base.resolution.y() {
+                for x in 0..self.image.base.resolution.x() {
                     for c in 0..3 {
                         phi += self.image.get_channel(Point2i::new(x, y), c);
                     }
diff --git a/shared/src/lights/distant.rs b/shared/src/lights/distant.rs
index 9756409..2d1def4 100644
--- a/shared/src/lights/distant.rs
+++ b/shared/src/lights/distant.rs
@@ -5,14 +5,14 @@ use crate::core::interaction::{Interaction, InteractionBase, SimpleInteraction};
 use crate::core::light::{LightBase, LightBounds, LightLiSample, LightSampleContext, LightTrait};
 use crate::core::spectrum::SpectrumTrait;
 use crate::spectra::{DenselySampledSpectrum, SampledSpectrum, SampledWavelengths};
-use crate::utils::{ArenaPtr, Ptr};
+use crate::utils::{DevicePtr, Ptr};
 use crate::{Float, PI};
 
 #[repr(C)]
 #[derive(Clone, Copy, Debug)]
 pub struct DistantLight {
     pub base: LightBase,
-    pub lemit: Ptr<DenselySampledSpectrum>,
+    pub lemit: DevicePtr<DenselySampledSpectrum>,
     pub scale: Float,
     pub scene_center: Point3f,
     pub scene_radius: Float,
diff --git a/shared/src/lights/goniometric.rs b/shared/src/lights/goniometric.rs
index 991c9c4..323cc6d 100644
--- a/shared/src/lights/goniometric.rs
+++ b/shared/src/lights/goniometric.rs
@@ -1,5 +1,5 @@
 use crate::core::geometry::{Bounds3f, Normal3f, Point2f, Point2i, Point3f, Ray, Vector3f};
-use crate::core::image::Image;
+use crate::core::image::{DeviceImage, ImageAccess};
 use crate::core::light::{
     LightBase, LightBounds, LightLiSample, LightSampleContext, LightTrait, LightType,
 };
@@ -7,17 +7,17 @@ use crate::core::medium::MediumInterface;
 use crate::core::spectrum::{Spectrum, SpectrumTrait};
 use crate::spectra::{DenselySampledSpectrum, SampledSpectrum, SampledWavelengths};
 use crate::utils::math::equal_area_sphere_to_square;
-use crate::utils::sampling::PiecewiseConstant2D;
-use crate::utils::{Ptr, Transform};
+use crate::utils::sampling::DevicePiecewiseConstant2D;
+use crate::utils::{DevicePtr, Transform};
 use crate::{Float, PI};
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Copy)]
 pub struct GoniometricLight {
     pub base: LightBase,
-    iemit: DenselySampledSpectrum,
-    scale: Float,
-    image: Ptr<Image>,
-    distrib: Ptr<PiecewiseConstant2D>,
+    pub iemit: DenselySampledSpectrum,
+    pub scale: Float,
+    pub image: DevicePtr<DeviceImage>,
+    pub distrib: DevicePtr<DevicePiecewiseConstant2D>,
 }
 
 impl GoniometricLight {
@@ -77,13 +77,14 @@ impl LightTrait for GoniometricLight {
 
     #[cfg(not(target_os = "cuda"))]
     fn phi(&self, lambda: SampledWavelengths) -> SampledSpectrum {
+        let resolution = self.image.resolution();
         let mut sum_y = 0.;
-        for y in 0..self.image.resolution.y() {
-            for x in 0..self.image.resolution.x() {
+        for y in 0..resolution.y() {
+            for x in 0..resolution.x() {
                 sum_y += self.image.get_channel(Point2i::new(x, y), 0);
             }
         }
         self.scale * self.iemit.sample(&lambda) * 4. * PI * sum_y
-            / (self.image.resolution.x() * self.image.resolution.y()) as Float
+            / (resolution.x() * resolution.y()) as Float
     }
 }
diff --git a/shared/src/lights/infinite.rs b/shared/src/lights/infinite.rs
index a145b60..4a9ea76 100644
--- a/shared/src/lights/infinite.rs
+++ b/shared/src/lights/infinite.rs
@@ -1,23 +1,10 @@
-use crate::{
-    core::{
-        geometry::{Frame, VectorLike},
-        interaction::InteractionBase,
-    },
-    spectra::{RGBColorSpace, RGBIlluminantSpectrum},
-    utils::{
-        math::{clamp, equal_area_sphere_to_square, equal_area_square_to_sphere, square},
-        sampling::{
-            AliasTable, PiecewiseConstant2D, WindowedPiecewiseConstant2D, sample_uniform_sphere,
-            uniform_sphere_pdf,
-        },
-    },
-};
-
 use crate::core::color::RGB;
 use crate::core::geometry::{
     Bounds2f, Bounds3f, Normal3f, Point2f, Point2i, Point3f, Ray, Vector2f, Vector3f,
 };
-use crate::core::image::{Image, PixelFormat, WrapMode};
+use crate::core::geometry::{Frame, VectorLike};
+use crate::core::image::{DeviceImage, ImageAccess, PixelFormat, WrapMode};
+use crate::core::interaction::InteractionBase;
 use crate::core::interaction::{Interaction, SimpleInteraction};
 use crate::core::light::{
     LightBase, LightBounds, LightLiSample, LightSampleContext, LightTrait, LightType,
@@ -25,8 +12,14 @@ use crate::core::light::{
 use crate::core::medium::{Medium, MediumInterface};
 use crate::core::spectrum::{Spectrum, SpectrumTrait};
 use crate::spectra::{DenselySampledSpectrum, SampledSpectrum, SampledWavelengths};
+use crate::spectra::{RGBColorSpace, RGBIlluminantSpectrum};
 use crate::utils::Transform;
-use crate::utils::ptr::Ptr;
+use crate::utils::math::{clamp, equal_area_sphere_to_square, equal_area_square_to_sphere, square};
+use crate::utils::ptr::DevicePtr;
+use crate::utils::sampling::{
+    AliasTable, DevicePiecewiseConstant2D, WindowedPiecewiseConstant2D, sample_uniform_sphere,
+    uniform_sphere_pdf,
+};
 use crate::{Float, PI};
 use std::sync::Arc;
 
@@ -34,7 +27,7 @@ use std::sync::Arc;
 #[derive(Debug, Copy, Clone)]
 pub struct InfiniteUniformLight {
     pub base: LightBase,
-    pub lemit: Ptr<DenselySampledSpectrum>,
+    pub lemit: DevicePtr<DenselySampledSpectrum>,
     pub scale: Float,
     pub scene_center: Point3f,
     pub scene_radius: Float,
@@ -122,10 +115,10 @@ impl LightTrait for InfiniteUniformLight {
 #[derive(Clone, Copy, Debug)]
 pub struct InfiniteImageLight {
     pub base: LightBase,
-    pub image: Ptr<Image>,
-    pub image_color_space: Ptr<RGBColorSpace>,
-    pub distrib: Ptr<PiecewiseConstant2D>,
-    pub compensated_distrib: Ptr<PiecewiseConstant2D>,
+    pub image: DevicePtr<DeviceImage>,
+    pub image_color_space: DevicePtr<RGBColorSpace>,
+    pub distrib: DevicePtr<DevicePiecewiseConstant2D>,
+    pub compensated_distrib: DevicePtr<DevicePiecewiseConstant2D>,
     pub scale: Float,
     pub scene_radius: Float,
     pub scene_center: Point3f,
@@ -258,8 +251,8 @@ impl LightTrait for InfiniteImageLight {
 #[derive(Debug, Copy, Clone)]
 pub struct InfinitePortalLight {
     pub base: LightBase,
-    pub image: Ptr<Image>,
-    pub image_color_space: Ptr<RGBColorSpace>,
+    pub image: DevicePtr<DeviceImage>,
+    pub image_color_space: DevicePtr<RGBColorSpace>,
     pub scale: Float,
     pub portal: [Point3f; 4],
     pub portal_frame: Frame,
diff --git a/shared/src/lights/point.rs b/shared/src/lights/point.rs
index 700cbe3..18c7f19 100644
--- a/shared/src/lights/point.rs
+++ b/shared/src/lights/point.rs
@@ -7,7 +7,7 @@ use crate::core::light::{
 };
 use crate::core::spectrum::SpectrumTrait;
 use crate::spectra::{DenselySampledSpectrum, SampledSpectrum, SampledWavelengths};
-use crate::utils::ptr::Ptr;
+use crate::utils::ptr::DevicePtr;
 use crate::{Float, PI};
 
 #[repr(C)]
@@ -15,7 +15,7 @@ use crate::{Float, PI};
 pub struct PointLight {
     pub base: LightBase,
     pub scale: Float,
-    pub i: Ptr<DenselySampledSpectrum>,
+    pub i: DevicePtr<DenselySampledSpectrum>,
 }
 
 impl LightTrait for PointLight {
diff --git a/shared/src/lights/projection.rs b/shared/src/lights/projection.rs
index 30ff666..2542c77 100644
--- a/shared/src/lights/projection.rs
+++ b/shared/src/lights/projection.rs
@@ -3,7 +3,7 @@ use crate::core::color::RGB;
 use crate::core::geometry::{
     Bounds2f, Bounds3f, Normal3f, Point2f, Point2i, Point3f, Ray, Vector3f, VectorLike, cos_theta,
 };
-use crate::core::image::Image;
+use crate::core::image::DeviceImage;
 use crate::core::light::{
     LightBase, LightBounds, LightLiSample, LightSampleContext, LightTrait, LightType,
 };
@@ -11,10 +11,10 @@ use crate::core::medium::MediumInterface;
 use crate::core::spectrum::SpectrumTrait;
 use crate::spectra::{SampledSpectrum, SampledWavelengths};
 use crate::utils::math::{radians, square};
-use crate::utils::ptr::Ptr;
+use crate::utils::ptr::DevicePtr;
 use crate::{
     spectra::{RGBColorSpace, RGBIlluminantSpectrum},
-    utils::{Transform, sampling::PiecewiseConstant2D},
+    utils::{Transform, sampling::DevicePiecewiseConstant2D},
 };
 
 #[repr(C)]
@@ -27,9 +27,9 @@ pub struct ProjectionLight {
     pub screen_from_light: Transform,
     pub light_from_screen: Transform,
     pub a: Float,
-    pub image: Ptr<Image>,
-    pub distrib: Ptr<PiecewiseConstant2D>,
-    pub image_color_space: Ptr<RGBColorSpace>,
+    pub image: DevicePtr<DeviceImage>,
+    pub distrib: DevicePtr<DevicePiecewiseConstant2D>,
+    pub image_color_space: DevicePtr<RGBColorSpace>,
 }
 
 impl ProjectionLight {
diff --git a/shared/src/lights/sampler.rs b/shared/src/lights/sampler.rs
index 24f0791..deeceaa 100644
--- a/shared/src/lights/sampler.rs
+++ b/shared/src/lights/sampler.rs
@@ -6,7 +6,7 @@ use crate::core::light::{LightBounds, LightSampleContext};
 use crate::spectra::{SampledSpectrum, SampledWavelengths};
 use crate::utils::math::{clamp, lerp, sample_discrete};
 use crate::utils::math::{safe_sqrt, square};
-use crate::utils::ptr::{Ptr, Slice};
+use crate::utils::ptr::{DevicePtr, Slice};
 use crate::utils::sampling::AliasTable;
 use crate::{Float, ONE_MINUS_EPSILON, PI};
 use enum_dispatch::enum_dispatch;
@@ -154,14 +154,14 @@ impl CompactLightBounds {
 
 #[derive(Debug, Clone)]
 pub struct SampledLight {
-    pub light: Ptr<Light>,
+    pub light: DevicePtr<Light>,
     pub p: Float,
 }
 
 impl SampledLight {
     pub fn new(light: Light, p: Float) -> Self {
         Self {
-            light: Ptr::from(&light),
+            light: DevicePtr::from(&light),
             p,
         }
     }
@@ -214,7 +214,7 @@ impl LightSamplerTrait for UniformLightSampler {
 
         let light_index = (u as u32 * self.lights_len).min(self.lights_len - 1) as usize;
         Some(SampledLight {
-            light: Ptr::from(&self.light(light_index)),
+            light: DevicePtr::from(&self.light(light_index)),
             p: 1. / self.lights_len as Float,
         })
     }
@@ -262,7 +262,7 @@ impl LightSamplerTrait for PowerLightSampler {
 
         let light_ref = &self.lights[light_index as usize];
         Some(SampledLight {
-            light: Ptr::from(light_ref),
+            light: DevicePtr::from(light_ref),
             p: pmf,
         })
     }
diff --git a/shared/src/lights/spot.rs b/shared/src/lights/spot.rs
index f5ee84f..fbd8c92 100644
--- a/shared/src/lights/spot.rs
+++ b/shared/src/lights/spot.rs
@@ -5,14 +5,14 @@ use crate::core::interaction::{Interaction, InteractionBase, InteractionTrait, S
 use crate::core::light::{LightBase, LightBounds, LightLiSample, LightSampleContext, LightTrait};
 use crate::core::spectrum::SpectrumTrait;
 use crate::spectra::{DenselySampledSpectrum, SampledSpectrum, SampledWavelengths};
-use crate::utils::Ptr;
+use crate::utils::DevicePtr;
 use crate::{Float, PI};
 
 #[repr(C)]
 #[derive(Clone, Copy, Debug)]
 pub struct SpotLight {
     pub base: LightBase,
-    pub iemit: Ptr<DenselySampledSpectrum>,
+    pub iemit: DevicePtr<DenselySampledSpectrum>,
     pub scale: Float,
     pub cos_falloff_start: Float,
     pub cos_falloff_end: Float,
diff --git a/shared/src/materials/coated.rs b/shared/src/materials/coated.rs
index 8ecc1b4..2433276 100644
--- a/shared/src/materials/coated.rs
+++ b/shared/src/materials/coated.rs
@@ -4,27 +4,27 @@ use crate::bxdfs::{
 use crate::core::bsdf::BSDF;
 use crate::core::bssrdf::BSSRDF;
 use crate::core::bxdf::BxDF;
-use crate::core::image::Image;
+use crate::core::image::DeviceImage;
 use crate::core::material::{Material, MaterialEvalContext, MaterialTrait};
 use crate::core::scattering::TrowbridgeReitzDistribution;
 use crate::core::spectrum::{Spectrum, SpectrumTrait};
 use crate::core::texture::{GPUFloatTexture, GPUSpectrumTexture, TextureEvaluator};
 use crate::spectra::{SampledSpectrum, SampledWavelengths};
-use crate::utils::Ptr;
+use crate::utils::DevicePtr;
 use crate::utils::math::clamp;
 
 #[repr(C)]
 #[derive(Clone, Copy, Debug)]
 pub struct CoatedDiffuseMaterial {
-    pub normal_map: Ptr<Image>,
-    pub displacement: Ptr<GPUFloatTexture>,
-    pub reflectance: Ptr<GPUSpectrumTexture>,
-    pub albedo: Ptr<GPUSpectrumTexture>,
-    pub u_roughness: Ptr<GPUFloatTexture>,
-    pub v_roughness: Ptr<GPUFloatTexture>,
-    pub thickness: Ptr<GPUFloatTexture>,
-    pub g: Ptr<GPUFloatTexture>,
-    pub eta: Ptr<Spectrum>,
+    pub normal_map: DevicePtr<DeviceImage>,
+    pub displacement: DevicePtr<GPUFloatTexture>,
+    pub reflectance: DevicePtr<GPUSpectrumTexture>,
+    pub albedo: DevicePtr<GPUSpectrumTexture>,
+    pub u_roughness: DevicePtr<GPUFloatTexture>,
+    pub v_roughness: DevicePtr<GPUFloatTexture>,
+    pub thickness: DevicePtr<GPUFloatTexture>,
+    pub g: DevicePtr<GPUFloatTexture>,
+    pub eta: DevicePtr<Spectrum>,
     pub remap_roughness: bool,
     pub max_depth: usize,
     pub n_samples: usize,
@@ -42,21 +42,21 @@ impl CoatedDiffuseMaterial {
         g: &GPUFloatTexture,
         eta: &Spectrum,
         displacement: &GPUFloatTexture,
-        normal_map: &Image,
+        normal_map: &DeviceImage,
         remap_roughness: bool,
         max_depth: usize,
         n_samples: usize,
     ) -> Self {
         Self {
-            displacement: Ptr::from(displacement),
-            normal_map: Ptr::from(normal_map),
-            reflectance: Ptr::from(reflectance),
-            albedo: Ptr::from(albedo),
-            u_roughness: Ptr::from(u_roughness),
-            v_roughness: Ptr::from(v_roughness),
-            thickness: Ptr::from(thickness),
-            g: Ptr::from(g),
-            eta: Ptr::from(eta),
+            displacement: DevicePtr::from(displacement),
+            normal_map: DevicePtr::from(normal_map),
+            reflectance: DevicePtr::from(reflectance),
+            albedo: DevicePtr::from(albedo),
+            u_roughness: DevicePtr::from(u_roughness),
+            v_roughness: DevicePtr::from(v_roughness),
+            thickness: DevicePtr::from(thickness),
+            g: DevicePtr::from(g),
+            eta: DevicePtr::from(eta),
             remap_roughness,
             max_depth,
             n_samples,
@@ -115,7 +115,7 @@ impl MaterialTrait for CoatedDiffuseMaterial {
             self.n_samples,
         ));
 
-        BSDF::new(ctx.ns, ctx.dpdus, Ptr::from(&bxdf))
+        BSDF::new(ctx.ns, ctx.dpdus, DevicePtr::from(&bxdf))
     }
 
     fn get_bssrdf<T>(
@@ -134,11 +134,11 @@ impl MaterialTrait for CoatedDiffuseMaterial {
         )
     }
 
-    fn get_normal_map(&self) -> Option<&Image> {
+    fn get_normal_map(&self) -> Option<&DeviceImage> {
         Some(&*self.normal_map)
     }
 
-    fn get_displacement(&self) -> Ptr<GPUFloatTexture> {
+    fn get_displacement(&self) -> DevicePtr<GPUFloatTexture> {
         self.displacement
     }
 
@@ -150,19 +150,19 @@ impl MaterialTrait for CoatedDiffuseMaterial {
 #[repr(C)]
 #[derive(Clone, Copy, Debug)]
 pub struct CoatedConductorMaterial {
-    normal_map: Ptr<Image>,
-    displacement: Ptr<GPUFloatTexture>,
-    interface_uroughness: Ptr<GPUFloatTexture>,
-    interface_vroughness: Ptr<GPUFloatTexture>,
-    thickness: Ptr<GPUFloatTexture>,
-    interface_eta: Ptr<Spectrum>,
-    g: Ptr<GPUFloatTexture>,
-    albedo: Ptr<GPUSpectrumTexture>,
-    conductor_uroughness: Ptr<GPUFloatTexture>,
-    conductor_vroughness: Ptr<GPUFloatTexture>,
-    conductor_eta: Ptr<GPUSpectrumTexture>,
-    k: Ptr<GPUSpectrumTexture>,
-    reflectance: Ptr<GPUSpectrumTexture>,
+    normal_map: DevicePtr<DeviceImage>,
+    displacement: DevicePtr<GPUFloatTexture>,
+    interface_uroughness: DevicePtr<GPUFloatTexture>,
+    interface_vroughness: DevicePtr<GPUFloatTexture>,
+    thickness: DevicePtr<GPUFloatTexture>,
+    interface_eta: DevicePtr<Spectrum>,
+    g: DevicePtr<GPUFloatTexture>,
+    albedo: DevicePtr<GPUSpectrumTexture>,
+    conductor_uroughness: DevicePtr<GPUFloatTexture>,
+    conductor_vroughness: DevicePtr<GPUFloatTexture>,
+    conductor_eta: DevicePtr<GPUSpectrumTexture>,
+    k: DevicePtr<GPUSpectrumTexture>,
+    reflectance: DevicePtr<GPUSpectrumTexture>,
     remap_roughness: bool,
     max_depth: u32,
     n_samples: u32,
@@ -172,7 +172,7 @@ impl CoatedConductorMaterial {
     #[allow(clippy::too_many_arguments)]
     #[cfg(not(target_os = "cuda"))]
     pub fn new(
-        normal_map: &Image,
+        normal_map: &DeviceImage,
         displacement: &GPUFloatTexture,
         interface_uroughness: &GPUFloatTexture,
         interface_vroughness: &GPUFloatTexture,
@@ -190,19 +190,19 @@ impl CoatedConductorMaterial {
         n_samples: u32,
     ) -> Self {
         Self {
-            displacement: Ptr::from(displacement),
-            normal_map: Ptr::from(normal_map),
-            interface_uroughness: Ptr::from(interface_uroughness),
-            interface_vroughness: Ptr::from(interface_vroughness),
-            thickness: Ptr::from(thickness),
-            interface_eta: Ptr::from(interface_eta),
-            g: Ptr::from(g),
-            albedo: Ptr::from(albedo),
-            conductor_uroughness: Ptr::from(conductor_uroughness),
-            conductor_vroughness: Ptr::from(conductor_vroughness),
-            conductor_eta: Ptr::from(conductor_eta),
-            k: Ptr::from(k),
-            reflectance: Ptr::from(reflectance),
+            displacement: DevicePtr::from(displacement),
+            normal_map: DevicePtr::from(normal_map),
+            interface_uroughness: DevicePtr::from(interface_uroughness),
+            interface_vroughness: DevicePtr::from(interface_vroughness),
+            thickness: DevicePtr::from(thickness),
+            interface_eta: DevicePtr::from(interface_eta),
+            g: DevicePtr::from(g),
+            albedo: DevicePtr::from(albedo),
+            conductor_uroughness: DevicePtr::from(conductor_uroughness),
+            conductor_vroughness: DevicePtr::from(conductor_vroughness),
+            conductor_eta: DevicePtr::from(conductor_eta),
+            k: DevicePtr::from(k),
+            reflectance: DevicePtr::from(reflectance),
             remap_roughness,
             max_depth,
             n_samples,
@@ -285,7 +285,7 @@ impl MaterialTrait for CoatedConductorMaterial {
             self.max_depth as usize,
             self.n_samples as usize,
         ));
-        BSDF::new(ctx.ns, ctx.dpdus, Ptr::from(&bxdf))
+        BSDF::new(ctx.ns, ctx.dpdus, DevicePtr::from(&bxdf))
     }
 
     fn get_bssrdf<T>(
@@ -326,11 +326,11 @@ impl MaterialTrait for CoatedConductorMaterial {
         tex_eval.can_evaluate(&float_textures, &spectrum_textures)
     }
 
-    fn get_normal_map(&self) -> Option<&Image> {
+    fn get_normal_map(&self) -> Option<&DeviceImage> {
         Some(&*self.normal_map)
     }
 
-    fn get_displacement(&self) -> Ptr<GPUFloatTexture> {
+    fn get_displacement(&self) -> DevicePtr<GPUFloatTexture> {
         self.displacement
     }
 
diff --git a/shared/src/materials/complex.rs b/shared/src/materials/complex.rs
index 761111e..974eb5e 100644
--- a/shared/src/materials/complex.rs
+++ b/shared/src/materials/complex.rs
@@ -6,40 +6,40 @@ use crate::bxdfs::{
 use crate::core::bsdf::BSDF;
 use crate::core::bssrdf::{BSSRDF, BSSRDFTable};
 use crate::core::bxdf::BxDF;
-use crate::core::image::Image;
+use crate::core::image::DeviceImage;
 use crate::core::material::{Material, MaterialEvalContext, MaterialTrait};
 use crate::core::scattering::TrowbridgeReitzDistribution;
 use crate::core::spectrum::{Spectrum, SpectrumTrait};
 use crate::core::texture::{GPUFloatTexture, GPUSpectrumTexture, TextureEvaluator};
 use crate::spectra::{SampledSpectrum, SampledWavelengths};
 use crate::textures::GPUSpectrumMixTexture;
-use crate::utils::Ptr;
+use crate::utils::DevicePtr;
 use crate::utils::math::clamp;
 
 #[repr(C)]
 #[derive(Clone, Copy, Debug)]
 pub struct HairMaterial {
-    pub sigma_a: Ptr<GPUSpectrumTexture>,
-    pub color: Ptr<GPUSpectrumTexture>,
-    pub eumelanin: Ptr<GPUFloatTexture>,
-    pub pheomelanin: Ptr<GPUFloatTexture>,
-    pub eta: Ptr<GPUFloatTexture>,
-    pub beta_m: Ptr<GPUFloatTexture>,
-    pub beta_n: Ptr<GPUFloatTexture>,
-    pub alpha: Ptr<GPUFloatTexture>,
+    pub sigma_a: DevicePtr<GPUSpectrumTexture>,
+    pub color: DevicePtr<GPUSpectrumTexture>,
+    pub eumelanin: DevicePtr<GPUFloatTexture>,
+    pub pheomelanin: DevicePtr<GPUFloatTexture>,
+    pub eta: DevicePtr<GPUFloatTexture>,
+    pub beta_m: DevicePtr<GPUFloatTexture>,
+    pub beta_n: DevicePtr<GPUFloatTexture>,
+    pub alpha: DevicePtr<GPUFloatTexture>,
 }
 
 impl HairMaterial {
     #[cfg(not(target_os = "cuda"))]
     pub fn new(
-        sigma_a: Ptr<GPUSpectrumTexture>,
-        color: Ptr<GPUSpectrumTexture>,
-        eumelanin: Ptr<GPUFloatTexture>,
-        pheomelanin: Ptr<GPUFloatTexture>,
-        eta: Ptr<GPUFloatTexture>,
-        beta_m: Ptr<GPUFloatTexture>,
-        beta_n: Ptr<GPUFloatTexture>,
-        alpha: Ptr<GPUFloatTexture>,
+        sigma_a: DevicePtr<GPUSpectrumTexture>,
+        color: DevicePtr<GPUSpectrumTexture>,
+        eumelanin: DevicePtr<GPUFloatTexture>,
+        pheomelanin: DevicePtr<GPUFloatTexture>,
+        eta: DevicePtr<GPUFloatTexture>,
+        beta_m: DevicePtr<GPUFloatTexture>,
+        beta_n: DevicePtr<GPUFloatTexture>,
+        alpha: DevicePtr<GPUFloatTexture>,
     ) -> Self {
         Self {
             sigma_a,
@@ -76,12 +76,12 @@ impl MaterialTrait for HairMaterial {
         todo!()
     }
 
-    fn get_normal_map(&self) -> Option<&Image> {
+    fn get_normal_map(&self) -> Option<&DeviceImage> {
         todo!()
     }
 
-    fn get_displacement(&self) -> Ptr<GPUFloatTexture> {
-        Ptr::null()
+    fn get_displacement(&self) -> DevicePtr<GPUFloatTexture> {
+        DevicePtr::null()
     }
 
     fn has_subsurface_scattering(&self) -> bool {
@@ -92,9 +92,9 @@ impl MaterialTrait for HairMaterial {
 #[repr(C)]
 #[derive(Clone, Copy, Debug)]
 pub struct MeasuredMaterial {
-    pub displacement: Ptr<GPUFloatTexture>,
-    pub normal_map: Ptr<Image>,
-    pub brdf: Ptr<MeasuredBxDFData>,
+    pub displacement: DevicePtr<GPUFloatTexture>,
+    pub normal_map: DevicePtr<DeviceImage>,
+    pub brdf: DevicePtr<MeasuredBxDFData>,
 }
 
 impl MaterialTrait for MeasuredMaterial {
@@ -121,11 +121,11 @@ impl MaterialTrait for MeasuredMaterial {
         true
     }
 
-    fn get_normal_map(&self) -> Option<&Image> {
+    fn get_normal_map(&self) -> Option<&DeviceImage> {
         Some(&*self.normal_map)
     }
 
-    fn get_displacement(&self) -> Ptr<GPUFloatTexture> {
+    fn get_displacement(&self) -> DevicePtr<GPUFloatTexture> {
         self.displacement
     }
 
@@ -137,16 +137,16 @@ impl MaterialTrait for MeasuredMaterial {
 #[repr(C)]
 #[derive(Clone, Copy, Debug)]
 pub struct SubsurfaceMaterial {
-    pub normal_map: Ptr<Image>,
-    pub displacement: Ptr<GPUFloatTexture>,
-    pub sigma_a: Ptr<GPUSpectrumTexture>,
-    pub sigma_s: Ptr<GPUSpectrumMixTexture>,
-    pub reflectance: Ptr<GPUSpectrumMixTexture>,
-    pub mfp: Ptr<GPUSpectrumMixTexture>,
+    pub normal_map: DevicePtr<DeviceImage>,
+    pub displacement: DevicePtr<GPUFloatTexture>,
+    pub sigma_a: DevicePtr<GPUSpectrumTexture>,
+    pub sigma_s: DevicePtr<GPUSpectrumMixTexture>,
+    pub reflectance: DevicePtr<GPUSpectrumMixTexture>,
+    pub mfp: DevicePtr<GPUSpectrumMixTexture>,
     pub eta: Float,
     pub scale: Float,
-    pub u_roughness: Ptr<GPUFloatTexture>,
-    pub v_roughness: Ptr<GPUFloatTexture>,
+    pub u_roughness: DevicePtr<GPUFloatTexture>,
+    pub v_roughness: DevicePtr<GPUFloatTexture>,
     pub remap_roughness: bool,
     pub table: BSSRDFTable,
 }
@@ -173,11 +173,11 @@ impl MaterialTrait for SubsurfaceMaterial {
         todo!()
     }
 
-    fn get_normal_map(&self) -> Option<&Image> {
+    fn get_normal_map(&self) -> Option<&DeviceImage> {
         todo!()
     }
 
-    fn get_displacement(&self) -> Ptr<GPUFloatTexture> {
+    fn get_displacement(&self) -> DevicePtr<GPUFloatTexture> {
         todo!()
     }
 
diff --git a/shared/src/materials/conductor.rs b/shared/src/materials/conductor.rs
index 26792e3..3454cb3 100644
--- a/shared/src/materials/conductor.rs
+++ b/shared/src/materials/conductor.rs
@@ -4,26 +4,26 @@ use crate::bxdfs::{
 use crate::core::bsdf::BSDF;
 use crate::core::bssrdf::BSSRDF;
 use crate::core::bxdf::BxDF;
-use crate::core::image::Image;
+use crate::core::image::DeviceImage;
 use crate::core::material::{Material, MaterialEvalContext, MaterialTrait};
 use crate::core::scattering::TrowbridgeReitzDistribution;
 use crate::core::spectrum::{Spectrum, SpectrumTrait};
 use crate::core::texture::{GPUFloatTexture, GPUSpectrumTexture, TextureEvaluator};
 use crate::spectra::{SampledSpectrum, SampledWavelengths};
-use crate::utils::Ptr;
+use crate::utils::DevicePtr;
 use crate::utils::math::clamp;
 
 #[repr(C)]
 #[derive(Clone, Copy, Debug)]
 pub struct ConductorMaterial {
-    pub displacement: Ptr<GPUFloatTexture>,
-    pub eta: Ptr<GPUSpectrumTexture>,
-    pub k: Ptr<GPUSpectrumTexture>,
-    pub reflectance: Ptr<GPUSpectrumTexture>,
-    pub u_roughness: Ptr<GPUFloatTexture>,
-    pub v_roughness: Ptr<GPUFloatTexture>,
+    pub displacement: DevicePtr<GPUFloatTexture>,
+    pub eta: DevicePtr<GPUSpectrumTexture>,
+    pub k: DevicePtr<GPUSpectrumTexture>,
+    pub reflectance: DevicePtr<GPUSpectrumTexture>,
+    pub u_roughness: DevicePtr<GPUFloatTexture>,
+    pub v_roughness: DevicePtr<GPUFloatTexture>,
     pub remap_roughness: bool,
-    pub normal_map: Ptr<Image>,
+    pub normal_map: DevicePtr<DeviceImage>,
 }
 
 impl MaterialTrait for ConductorMaterial {
@@ -50,11 +50,11 @@ impl MaterialTrait for ConductorMaterial {
         )
     }
 
-    fn get_normal_map(&self) -> Option<&Image> {
+    fn get_normal_map(&self) -> Option<&DeviceImage> {
         todo!()
     }
 
-    fn get_displacement(&self) -> Ptr<GPUFloatTexture> {
+    fn get_displacement(&self) -> DevicePtr<GPUFloatTexture> {
         todo!()
     }
 
diff --git a/shared/src/materials/dielectric.rs b/shared/src/materials/dielectric.rs
index 58faa95..99f62ef 100644
--- a/shared/src/materials/dielectric.rs
+++ b/shared/src/materials/dielectric.rs
@@ -4,23 +4,23 @@ use crate::bxdfs::{
 use crate::core::bsdf::BSDF;
 use crate::core::bssrdf::BSSRDF;
 use crate::core::bxdf::BxDF;
-use crate::core::image::Image;
+use crate::core::image::DeviceImage;
 use crate::core::material::{Material, MaterialEvalContext, MaterialTrait};
 use crate::core::scattering::TrowbridgeReitzDistribution;
 use crate::core::spectrum::{Spectrum, SpectrumTrait};
 use crate::core::texture::{GPUFloatTexture, GPUSpectrumTexture, TextureEvaluator};
 use crate::spectra::{SampledSpectrum, SampledWavelengths};
-use crate::utils::Ptr;
+use crate::utils::DevicePtr;
 use crate::utils::math::clamp;
 
 #[repr(C)]
 #[derive(Clone, Copy, Debug)]
 pub struct DielectricMaterial {
-    normal_map: Ptr<Image>,
-    displacement: Ptr<GPUFloatTexture>,
-    u_roughness: Ptr<GPUFloatTexture>,
-    v_roughness: Ptr<GPUFloatTexture>,
-    eta: Ptr<Spectrum>,
+    normal_map: DevicePtr<DeviceImage>,
+    displacement: DevicePtr<GPUFloatTexture>,
+    u_roughness: DevicePtr<GPUFloatTexture>,
+    v_roughness: DevicePtr<GPUFloatTexture>,
+    eta: DevicePtr<Spectrum>,
     remap_roughness: bool,
 }
 
@@ -51,7 +51,7 @@ impl MaterialTrait for DielectricMaterial {
         let distrib = TrowbridgeReitzDistribution::new(u_rough, v_rough);
         let bxdf = BxDF::Dielectric(DielectricBxDF::new(sampled_eta, distrib));
 
-        BSDF::new(ctx.ns, ctx.dpdus, Ptr::from(&bxdf))
+        BSDF::new(ctx.ns, ctx.dpdus, DevicePtr::from(&bxdf))
     }
 
     fn get_bssrdf<T>(
@@ -67,11 +67,11 @@ impl MaterialTrait for DielectricMaterial {
         tex_eval.can_evaluate(&[self.u_roughness, self.v_roughness], &[])
     }
 
-    fn get_normal_map(&self) -> Option<&Image> {
+    fn get_normal_map(&self) -> Option<&DeviceImage> {
         Some(&*self.normal_map)
     }
 
-    fn get_displacement(&self) -> Ptr<GPUFloatTexture> {
+    fn get_displacement(&self) -> DevicePtr<GPUFloatTexture> {
         self.displacement
     }
 
@@ -83,9 +83,9 @@ impl MaterialTrait for DielectricMaterial {
 #[repr(C)]
 #[derive(Clone, Copy, Debug)]
 pub struct ThinDielectricMaterial {
-    pub displacement: Ptr<GPUFloatTexture>,
-    pub normal_map: Ptr<Image>,
-    pub eta: Ptr<Spectrum>,
+    pub displacement: DevicePtr<GPUFloatTexture>,
+    pub normal_map: DevicePtr<DeviceImage>,
+    pub eta: DevicePtr<Spectrum>,
 }
 impl MaterialTrait for ThinDielectricMaterial {
     fn get_bsdf<T: TextureEvaluator>(
@@ -109,11 +109,11 @@ impl MaterialTrait for ThinDielectricMaterial {
         true
     }
 
-    fn get_normal_map(&self) -> Option<&Image> {
+    fn get_normal_map(&self) -> Option<&DeviceImage> {
         Some(&*self.normal_map)
     }
 
-    fn get_displacement(&self) -> Ptr<GPUFloatTexture> {
+    fn get_displacement(&self) -> DevicePtr<GPUFloatTexture> {
         self.displacement
     }
 
diff --git a/shared/src/materials/diffuse.rs b/shared/src/materials/diffuse.rs
index b1100a6..40ce86f 100644
--- a/shared/src/materials/diffuse.rs
+++ b/shared/src/materials/diffuse.rs
@@ -5,21 +5,21 @@ use crate::bxdfs::{
 use crate::core::bsdf::BSDF;
 use crate::core::bssrdf::BSSRDF;
 use crate::core::bxdf::BxDF;
-use crate::core::image::Image;
+use crate::core::image::DeviceImage;
 use crate::core::material::{Material, MaterialEvalContext, MaterialTrait};
 use crate::core::scattering::TrowbridgeReitzDistribution;
 use crate::core::spectrum::{Spectrum, SpectrumTrait};
 use crate::core::texture::{GPUFloatTexture, GPUSpectrumTexture, TextureEvaluator};
 use crate::spectra::{SampledSpectrum, SampledWavelengths};
-use crate::utils::Ptr;
+use crate::utils::DevicePtr;
 use crate::utils::math::clamp;
 
 #[repr(C)]
 #[derive(Clone, Copy, Debug)]
 pub struct DiffuseMaterial {
-    pub normal_map: Ptr<Image>,
-    pub displacement: Ptr<GPUFloatTexture>,
-    pub reflectance: Ptr<GPUSpectrumTexture>,
+    pub normal_map: DevicePtr<DeviceImage>,
+    pub displacement: DevicePtr<GPUFloatTexture>,
+    pub reflectance: DevicePtr<GPUSpectrumTexture>,
 }
 
 impl MaterialTrait for DiffuseMaterial {
@@ -31,7 +31,7 @@ impl MaterialTrait for DiffuseMaterial {
     ) -> BSDF {
         let r = tex_eval.evaluate_spectrum(&self.reflectance, ctx, lambda);
         let bxdf = BxDF::Diffuse(DiffuseBxDF::new(r));
-        BSDF::new(ctx.ns, ctx.dpdus, Ptr::from(&bxdf))
+        BSDF::new(ctx.ns, ctx.dpdus, DevicePtr::from(&bxdf))
     }
 
     fn get_bssrdf<T>(
@@ -47,11 +47,11 @@ impl MaterialTrait for DiffuseMaterial {
         tex_eval.can_evaluate(&[], &[self.reflectance])
     }
 
-    fn get_normal_map(&self) -> Option<&Image> {
+    fn get_normal_map(&self) -> Option<&DeviceImage> {
         Some(&*self.normal_map)
     }
 
-    fn get_displacement(&self) -> Ptr<GPUFloatTexture> {
+    fn get_displacement(&self) -> DevicePtr<GPUFloatTexture> {
         self.displacement
     }
 
@@ -63,10 +63,10 @@ impl MaterialTrait for DiffuseMaterial {
 #[repr(C)]
 #[derive(Clone, Copy, Debug)]
 pub struct DiffuseTransmissionMaterial {
-    pub image: Ptr<Image>,
-    pub displacement: Ptr<GPUFloatTexture>,
-    pub reflectance: Ptr<GPUFloatTexture>,
-    pub transmittance: Ptr<GPUFloatTexture>,
+    pub image: DevicePtr<DeviceImage>,
+    pub displacement: DevicePtr<GPUFloatTexture>,
+    pub reflectance: DevicePtr<GPUFloatTexture>,
+    pub transmittance: DevicePtr<GPUFloatTexture>,
     pub scale: Float,
 }
 
@@ -92,11 +92,11 @@ impl MaterialTrait for DiffuseTransmissionMaterial {
         tex_eval.can_evaluate(&[self.reflectance, self.transmittance], &[])
     }
 
-    fn get_normal_map(&self) -> Option<&Image> {
+    fn get_normal_map(&self) -> Option<&DeviceImage> {
         Some(&*self.image)
     }
 
-    fn get_displacement(&self) -> Ptr<GPUFloatTexture> {
+    fn get_displacement(&self) -> DevicePtr<GPUFloatTexture> {
         self.displacement
     }
 
diff --git a/shared/src/materials/mix.rs b/shared/src/materials/mix.rs
index 27b4260..135eb3c 100644
--- a/shared/src/materials/mix.rs
+++ b/shared/src/materials/mix.rs
@@ -4,7 +4,7 @@ use crate::bxdfs::{
 use crate::core::bsdf::BSDF;
 use crate::core::bssrdf::BSSRDF;
 use crate::core::bxdf::BxDF;
-use crate::core::image::Image;
+use crate::core::image::DeviceImage;
 use crate::core::material::{Material, MaterialEvalContext, MaterialTrait};
 use crate::core::scattering::TrowbridgeReitzDistribution;
 use crate::core::spectrum::{Spectrum, SpectrumTrait};
@@ -12,13 +12,13 @@ use crate::core::texture::{GPUFloatTexture, GPUSpectrumTexture, TextureEvaluator
 use crate::spectra::{SampledSpectrum, SampledWavelengths};
 use crate::utils::hash::hash_float;
 use crate::utils::math::clamp;
-use crate::utils::{ArenaPtr, Ptr};
+use crate::utils::{DevicePtr, Ptr};
 
 #[repr(C)]
 #[derive(Clone, Copy, Debug)]
 pub struct MixMaterial {
-    pub amount: Ptr<GPUFloatTexture>,
-    pub materials: [ArenaPtr<Material>; 2],
+    pub amount: DevicePtr<GPUFloatTexture>,
+    pub materials: [Ptr<Material>; 2],
 }
 
 impl MixMaterial {
@@ -69,11 +69,11 @@ impl MaterialTrait for MixMaterial {
         tex_eval.can_evaluate(&[self.amount], &[])
     }
 
-    fn get_normal_map(&self) -> Option<&Image> {
+    fn get_normal_map(&self) -> Option<&DeviceImage> {
         None
     }
 
-    fn get_displacement(&self) -> Ptr<GPUFloatTexture> {
+    fn get_displacement(&self) -> DevicePtr<GPUFloatTexture> {
         panic!(
             "MixMaterial::get_displacement() shouldn't be called. \
                Displacement is not supported on Mix materials directly."
diff --git a/shared/src/spectra/colorspace.rs b/shared/src/spectra/colorspace.rs
index bf858be..a79e8d0 100644
--- a/shared/src/spectra/colorspace.rs
+++ b/shared/src/spectra/colorspace.rs
@@ -3,17 +3,17 @@ use crate::core::geometry::Point2f;
 use crate::core::pbrt::Float;
 use crate::spectra::{DenselySampledSpectrum, SampledSpectrum};
 use crate::utils::math::SquareMatrix3f;
-use crate::utils::ptr::Ptr;
+use crate::utils::ptr::DevicePtr;
 
 use std::cmp::{Eq, PartialEq};
 
 #[repr(C)]
 #[derive(Copy, Debug, Clone)]
 pub struct StandardColorSpaces {
-    pub srgb: Ptr<RGBColorSpace>,
-    pub dci_p3: Ptr<RGBColorSpace>,
-    pub rec2020: Ptr<RGBColorSpace>,
-    pub aces2065_1: Ptr<RGBColorSpace>,
+    pub srgb: DevicePtr<RGBColorSpace>,
+    pub dci_p3: DevicePtr<RGBColorSpace>,
+    pub rec2020: DevicePtr<RGBColorSpace>,
+    pub aces2065_1: DevicePtr<RGBColorSpace>,
 }
 
 #[repr(C)]
@@ -24,7 +24,7 @@ pub struct RGBColorSpace {
     pub b: Point2f,
     pub w: Point2f,
     pub illuminant: DenselySampledSpectrum,
-    pub rgb_to_spectrum_table: Ptr<RGBToSpectrumTable>,
+    pub rgb_to_spectrum_table: DevicePtr<RGBToSpectrumTable>,
     pub xyz_from_rgb: SquareMatrix3f,
     pub rgb_from_xyz: SquareMatrix3f,
 }
@@ -52,6 +52,14 @@ impl RGBColorSpace {
 
         self.rgb_from_xyz * other.xyz_from_rgb
     }
+
+    pub fn luminance_vector(&self) -> RGB {
+        RGB::new(
+            self.xyz_from_rgb[1][0],
+            self.xyz_from_rgb[1][1],
+            self.xyz_from_rgb[1][2],
+        )
+    }
 }
 
 impl PartialEq for RGBColorSpace {
diff --git a/shared/src/spectra/rgb.rs b/shared/src/spectra/rgb.rs
index 1044b10..1f0d454 100644
--- a/shared/src/spectra/rgb.rs
+++ b/shared/src/spectra/rgb.rs
@@ -4,7 +4,7 @@ use super::{
 };
 use crate::core::color::{RGB, RGBSigmoidPolynomial, XYZ};
 use crate::core::spectrum::SpectrumTrait;
-use crate::utils::Ptr;
+use crate::utils::DevicePtr;
 
 use crate::Float;
 
@@ -69,7 +69,7 @@ impl SpectrumTrait for UnboundedRGBSpectrum {
 pub struct RGBIlluminantSpectrum {
     pub scale: Float,
     pub rsp: RGBSigmoidPolynomial,
-    pub illuminant: Ptr<DenselySampledSpectrum>,
+    pub illuminant: DevicePtr<DenselySampledSpectrum>,
 }
 
 impl RGBIlluminantSpectrum {
@@ -85,7 +85,7 @@ impl RGBIlluminantSpectrum {
         Self {
             scale,
             rsp,
-            illuminant: Ptr::from(&illuminant),
+            illuminant: DevicePtr::from(&illuminant),
         }
     }
 }
diff --git a/shared/src/spectra/simple.rs b/shared/src/spectra/simple.rs
index 97bb901..4d2fcd6 100644
--- a/shared/src/spectra/simple.rs
+++ b/shared/src/spectra/simple.rs
@@ -2,7 +2,7 @@ use super::cie::*;
 use super::sampled::{LAMBDA_MAX, LAMBDA_MIN};
 use crate::core::spectrum::{Spectrum, SpectrumTrait};
 use crate::spectra::{N_SPECTRUM_SAMPLES, SampledSpectrum, SampledWavelengths};
-use crate::utils::ptr::Ptr;
+use crate::utils::ptr::DevicePtr;
 use crate::{Float, find_interval};
 use core::slice;
 use std::hash::{Hash, Hasher};
@@ -35,7 +35,7 @@ impl SpectrumTrait for ConstantSpectrum {
 pub struct DenselySampledSpectrum {
     pub lambda_min: i32,
     pub lambda_max: i32,
-    pub values: Ptr<Float>,
+    pub values: DevicePtr<Float>,
 }
 
 unsafe impl Send for DenselySampledSpectrum {}
@@ -130,8 +130,8 @@ impl SpectrumTrait for DenselySampledSpectrum {
 #[repr(C)]
 #[derive(Debug, Clone, Copy)]
 pub struct PiecewiseLinearSpectrum {
-    pub lambdas: Ptr<Float>,
-    pub values: Ptr<Float>,
+    pub lambdas: DevicePtr<Float>,
+    pub values: DevicePtr<Float>,
     pub count: u32,
 }
 
diff --git a/shared/src/textures/bilerp.rs b/shared/src/textures/bilerp.rs
index 57fd128..a521053 100644
--- a/shared/src/textures/bilerp.rs
+++ b/shared/src/textures/bilerp.rs
@@ -3,7 +3,7 @@ use crate::core::spectrum::Spectrum;
 use crate::core::spectrum::SpectrumTrait;
 use crate::core::texture::{TextureEvalContext, TextureMapping2D};
 use crate::spectra::{SampledSpectrum, SampledWavelengths};
-use crate::utils::{Ptr, Transform};
+use crate::utils::{DevicePtr, Transform};
 
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]
@@ -48,19 +48,19 @@ impl FloatBilerpTexture {
 #[derive(Clone, Copy, Debug)]
 pub struct SpectrumBilerpTexture {
     pub mapping: TextureMapping2D,
-    pub v00: Ptr<Spectrum>,
-    pub v01: Ptr<Spectrum>,
-    pub v10: Ptr<Spectrum>,
-    pub v11: Ptr<Spectrum>,
+    pub v00: DevicePtr<Spectrum>,
+    pub v01: DevicePtr<Spectrum>,
+    pub v10: DevicePtr<Spectrum>,
+    pub v11: DevicePtr<Spectrum>,
 }
 
 impl SpectrumBilerpTexture {
     pub fn new(
         mapping: TextureMapping2D,
-        v00: Ptr<Spectrum>,
-        v01: Ptr<Spectrum>,
-        v10: Ptr<Spectrum>,
-        v11: Ptr<Spectrum>,
+        v00: DevicePtr<Spectrum>,
+        v01: DevicePtr<Spectrum>,
+        v10: DevicePtr<Spectrum>,
+        v11: DevicePtr<Spectrum>,
     ) -> Self {
         Self {
             mapping,
diff --git a/shared/src/textures/checkerboard.rs b/shared/src/textures/checkerboard.rs
index 1600cf5..629ccab 100644
--- a/shared/src/textures/checkerboard.rs
+++ b/shared/src/textures/checkerboard.rs
@@ -4,12 +4,12 @@ use crate::core::texture::{
     TextureMapping3DTrait,
 };
 use crate::spectra::{SampledSpectrum, SampledWavelengths};
-use crate::utils::{ArenaPtr, Ptr, math::square};
+use crate::utils::{DevicePtr, Ptr, math::square};
 
 fn checkerboard(
     ctx: &TextureEvalContext,
-    map2d: Ptr<TextureMapping2D>,
-    map3d: Ptr<TextureMapping3D>,
+    map2d: DevicePtr<TextureMapping2D>,
+    map3d: DevicePtr<TextureMapping3D>,
 ) -> Float {
     let d = |x: Float| -> Float {
         let y = x / 2. - (x / 2.).floor() - 0.5;
@@ -43,9 +43,9 @@ fn checkerboard(
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]
 pub struct FloatCheckerboardTexture {
-    pub map2d: Ptr<TextureMapping2D>,
-    pub map3d: Ptr<TextureMapping3D>,
-    pub tex: [ArenaPtr<GPUFloatTexture>; 2],
+    pub map2d: DevicePtr<TextureMapping2D>,
+    pub map3d: DevicePtr<TextureMapping3D>,
+    pub tex: [Ptr<GPUFloatTexture>; 2],
 }
 
 impl FloatCheckerboardTexture {
@@ -74,9 +74,9 @@ impl FloatCheckerboardTexture {
 #[repr(C)]
 #[derive(Clone, Copy, Debug)]
 pub struct SpectrumCheckerboardTexture {
-    pub map2d: Ptr<TextureMapping2D>,
-    pub map3d: Ptr<TextureMapping3D>,
-    pub tex: [ArenaPtr<GPUSpectrumTexture>; 2],
+    pub map2d: DevicePtr<TextureMapping2D>,
+    pub map3d: DevicePtr<TextureMapping3D>,
+    pub tex: [Ptr<GPUSpectrumTexture>; 2],
 }
 
 impl SpectrumCheckerboardTexture {
diff --git a/shared/src/textures/dots.rs b/shared/src/textures/dots.rs
index 896466f..77158eb 100644
--- a/shared/src/textures/dots.rs
+++ b/shared/src/textures/dots.rs
@@ -4,7 +4,7 @@ use crate::core::texture::{
     GPUFloatTexture, GPUSpectrumTexture, TextureEvalContext, TextureMapping2D,
 };
 use crate::spectra::sampled::{SampledSpectrum, SampledWavelengths};
-use crate::utils::Ptr;
+use crate::utils::DevicePtr;
 use crate::utils::math::square;
 use crate::utils::noise::noise_2d;
 
@@ -28,8 +28,8 @@ fn inside_polka_dot(st: Point2f) -> bool {
 #[derive(Debug, Clone, Copy)]
 pub struct FloatDotsTexture {
     pub mapping: TextureMapping2D,
-    pub outside_dot: Ptr<GPUFloatTexture>,
-    pub inside_dot: Ptr<GPUFloatTexture>,
+    pub outside_dot: DevicePtr<GPUFloatTexture>,
+    pub inside_dot: DevicePtr<GPUFloatTexture>,
 }
 
 impl FloatDotsTexture {
@@ -53,8 +53,8 @@ impl FloatDotsTexture {
 #[derive(Clone, Copy, Debug)]
 pub struct SpectrumDotsTexture {
     pub mapping: TextureMapping2D,
-    pub outside_dot: Ptr<GPUSpectrumTexture>,
-    pub inside_dot: Ptr<GPUSpectrumTexture>,
+    pub outside_dot: DevicePtr<GPUSpectrumTexture>,
+    pub inside_dot: DevicePtr<GPUSpectrumTexture>,
 }
 
 impl SpectrumDotsTexture {
diff --git a/shared/src/textures/image.rs b/shared/src/textures/image.rs
index e9c912d..901ef54 100644
--- a/shared/src/textures/image.rs
+++ b/shared/src/textures/image.rs
@@ -95,11 +95,13 @@ impl GPUFloatImageTexture {
             let d_p_dy = [c.dsdy, c.dtdy];
             let val: Float = unsafe { intrinsics::tex2d_grad(self.tex_obj, u, v, d_p_dx, d_p_dy) };
 
-            if self.invert {
-                return (1. - v).max(0.);
+            let result = if self.invert {
+                (1.0 - val).max(0.0) // Invert the pixel intensity
             } else {
-                return v;
-            }
+                val
+            };
+
+            return result * self.scale;
         }
     }
 }
diff --git a/shared/src/textures/marble.rs b/shared/src/textures/marble.rs
index 47bd726..f6f2a47 100644
--- a/shared/src/textures/marble.rs
+++ b/shared/src/textures/marble.rs
@@ -6,7 +6,7 @@ use crate::core::texture::{TextureEvalContext, TextureMapping3D};
 use crate::spectra::{RGBAlbedoSpectrum, RGBColorSpace, SampledSpectrum, SampledWavelengths};
 use crate::utils::math::clamp;
 use crate::utils::noise::fbm;
-use crate::utils::ptr::Ptr;
+use crate::utils::ptr::DevicePtr;
 use crate::utils::splines::evaluate_cubic_bezier;
 
 #[repr(C)]
@@ -18,7 +18,7 @@ pub struct MarbleTexture {
     pub scale: Float,
     pub variation: Float,
     // TODO: DO not forget to pass StandardColorSpace here!!
-    pub colorspace: Ptr<RGBColorSpace>,
+    pub colorspace: DevicePtr<RGBColorSpace>,
 }
 
 unsafe impl Send for MarbleTexture {}
diff --git a/shared/src/textures/mix.rs b/shared/src/textures/mix.rs
index 4be69ab..850284e 100644
--- a/shared/src/textures/mix.rs
+++ b/shared/src/textures/mix.rs
@@ -2,14 +2,14 @@ use crate::Float;
 use crate::core::geometry::{Vector3f, VectorLike};
 use crate::core::texture::{GPUFloatTexture, GPUSpectrumTexture, TextureEvalContext};
 use crate::spectra::{SampledSpectrum, SampledWavelengths};
-use crate::utils::ArenaPtr;
+use crate::utils::Ptr;
 
 #[repr(C)]
 #[derive(Copy, Clone, Debug)]
 pub struct GPUFloatMixTexture {
-    pub tex1: ArenaPtr<GPUFloatTexture>,
-    pub tex2: ArenaPtr<GPUFloatTexture>,
-    pub amount: ArenaPtr<GPUFloatTexture>,
+    pub tex1: Ptr<GPUFloatTexture>,
+    pub tex2: Ptr<GPUFloatTexture>,
+    pub amount: Ptr<GPUFloatTexture>,
 }
 
 impl GPUFloatMixTexture {
@@ -34,8 +34,8 @@ impl GPUFloatMixTexture {
 #[repr(C)]
 #[derive(Copy, Clone, Debug)]
 pub struct GPUFloatDirectionMixTexture {
-    pub tex1: ArenaPtr<GPUFloatTexture>,
-    pub tex2: ArenaPtr<GPUFloatTexture>,
+    pub tex1: Ptr<GPUFloatTexture>,
+    pub tex2: Ptr<GPUFloatTexture>,
     pub dir: Vector3f,
 }
 
@@ -61,9 +61,9 @@ impl GPUFloatDirectionMixTexture {
 #[repr(C)]
 #[derive(Copy, Clone, Debug)]
 pub struct GPUSpectrumMixTexture {
-    pub tex1: ArenaPtr<GPUSpectrumTexture>,
-    pub tex2: ArenaPtr<GPUSpectrumTexture>,
-    pub amount: ArenaPtr<GPUFloatTexture>,
+    pub tex1: Ptr<GPUSpectrumTexture>,
+    pub tex2: Ptr<GPUSpectrumTexture>,
+    pub amount: Ptr<GPUFloatTexture>,
 }
 
 impl GPUSpectrumMixTexture {
@@ -98,8 +98,8 @@ impl GPUSpectrumMixTexture {
 #[repr(C)]
 #[derive(Copy, Clone, Debug)]
 pub struct GPUSpectrumDirectionMixTexture {
-    pub tex1: ArenaPtr<GPUSpectrumTexture>,
-    pub tex2: ArenaPtr<GPUSpectrumTexture>,
+    pub tex1: Ptr<GPUSpectrumTexture>,
+    pub tex2: Ptr<GPUSpectrumTexture>,
     pub dir: Vector3f,
 }
 
diff --git a/shared/src/textures/ptex.rs b/shared/src/textures/ptex.rs
index 8a0589e..19abde2 100644
--- a/shared/src/textures/ptex.rs
+++ b/shared/src/textures/ptex.rs
@@ -6,7 +6,7 @@ use crate::spectra::{
     RGBAlbedoSpectrum, RGBColorSpace, RGBIlluminantSpectrum, RGBUnboundedSpectrum, SampledSpectrum,
     SampledWavelengths, StandardColorSpaces,
 };
-use crate::utils::ptr::{Ptr, Slice};
+use crate::utils::ptr::{DevicePtr, Slice};
 
 #[repr(C)]
 #[derive(Debug, Clone, Copy)]
diff --git a/shared/src/textures/scaled.rs b/shared/src/textures/scaled.rs
index 435c902..0d79b6f 100644
--- a/shared/src/textures/scaled.rs
+++ b/shared/src/textures/scaled.rs
@@ -1,13 +1,13 @@
 use crate::Float;
 use crate::core::texture::{GPUFloatTexture, GPUSpectrumTexture, TextureEvalContext};
 use crate::spectra::{SampledSpectrum, SampledWavelengths};
-use crate::utils::ArenaPtr;
+use crate::utils::Ptr;
 
 #[repr(C)]
 #[derive(Debug, Clone, Copy)]
 pub struct GPUFloatScaledTexture {
-    pub tex: ArenaPtr<GPUFloatTexture>,
-    pub scale: ArenaPtr<GPUFloatTexture>,
+    pub tex: Ptr<GPUFloatTexture>,
+    pub scale: Ptr<GPUFloatTexture>,
 }
 
 impl GPUFloatScaledTexture {
@@ -23,8 +23,8 @@ impl GPUFloatScaledTexture {
 #[repr(C)]
 #[derive(Debug, Clone, Copy)]
 pub struct GPUSpectrumScaledTexture {
-    pub tex: ArenaPtr<GPUSpectrumTexture>,
-    pub scale: ArenaPtr<GPUFloatTexture>,
+    pub tex: Ptr<GPUSpectrumTexture>,
+    pub scale: Ptr<GPUFloatTexture>,
 }
 
 impl GPUSpectrumScaledTexture {
diff --git a/shared/src/utils/math.rs b/shared/src/utils/math.rs
index 1569be7..c9c9b12 100644
--- a/shared/src/utils/math.rs
+++ b/shared/src/utils/math.rs
@@ -5,7 +5,7 @@ use crate::core::pbrt::{Float, FloatBitOps, FloatBits, ONE_MINUS_EPSILON, PI, PI
 use crate::utils::hash::{hash_buffer, mix_bits};
 use crate::utils::sobol::{SOBOL_MATRICES_32, VDC_SOBOL_MATRICES, VDC_SOBOL_MATRICES_INV};
 
-use crate::utils::Ptr;
+use crate::utils::DevicePtr;
 use half::f16;
 use num_traits::{Float as NumFloat, Num, One, Signed, Zero};
 use std::error::Error;
@@ -753,7 +753,7 @@ pub fn inverse_radical_inverse(mut inverse: u64, base: u64, n_digits: u64) -> u6
 pub struct DigitPermutation {
     pub base: u32,
     pub n_digits: u32,
-    pub permutations: Ptr<u16>,
+    pub permutations: DevicePtr<u16>,
 }
 
 impl DigitPermutation {
diff --git a/shared/src/utils/mesh.rs b/shared/src/utils/mesh.rs
index da87a1e..b9bd110 100644
--- a/shared/src/utils/mesh.rs
+++ b/shared/src/utils/mesh.rs
@@ -1,8 +1,8 @@
 use crate::Float;
 use crate::core::geometry::{Normal3f, Point2f, Point3f, Vector3f};
+use crate::utils::Ptr;
 use crate::utils::Transform;
-use crate::utils::ptr::Ptr;
-use crate::utils::sampling::PiecewiseConstant2D;
+use crate::utils::sampling::DevicePiecewiseConstant2D;
 
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]
@@ -30,5 +30,5 @@ pub struct BilinearPatchMesh {
     pub p: Ptr<Point3f>,
     pub n: Ptr<Normal3f>,
     pub uv: Ptr<Point2f>,
-    pub image_distribution: Ptr<PiecewiseConstant2D>,
+    pub image_distribution: Ptr<DevicePiecewiseConstant2D>,
 }
diff --git a/shared/src/utils/mod.rs b/shared/src/utils/mod.rs
index 9b0e4e4..0fdcf82 100644
--- a/shared/src/utils/mod.rs
+++ b/shared/src/utils/mod.rs
@@ -15,7 +15,7 @@ pub mod sobol;
 pub mod splines;
 pub mod transform;
 
-pub use ptr::{ArenaPtr, Ptr};
+pub use ptr::{DevicePtr, Ptr};
 pub use transform::{AnimatedTransform, Transform, TransformGeneric};
 
 #[inline]
diff --git a/shared/src/utils/ptr.rs b/shared/src/utils/ptr.rs
index c9e0e7b..56359bc 100644
--- a/shared/src/utils/ptr.rs
+++ b/shared/src/utils/ptr.rs
@@ -3,84 +3,63 @@ use core::ops::Index;
 
 #[repr(C)]
 #[derive(Debug)]
-pub struct ArenaPtr<T: ?Sized> {
-    offset: i32,
-    _marker: PhantomData<T>,
+pub struct Ptr<T: ?Sized> {
+    pub offset: u32,
+    pub _marker: PhantomData<T>,
 }
 
-impl<T: ?Sized> Clone for ArenaPtr<T> {
+impl<T: ?Sized> Clone for Ptr<T> {
     fn clone(&self) -> Self {
         *self
     }
 }
+impl<T: ?Sized> Copy for Ptr<T> {}
 
-impl<T: ?Sized> Copy for ArenaPtr<T> {}
-
-impl<T> ArenaPtr<T> {
+impl<T> Ptr<T> {
+    pub const NULL_OFFSET: u32 = 0xFFFFFFFF;
     pub fn null() -> Self {
         Self {
-            offset: 0xFFFFFFFF,
+            offset: Self::NULL_OFFSET,
             _marker: PhantomData,
         }
     }
 
     pub fn is_null(&self) -> bool {
-        self.offset == 0xFFFFFFFF
+        self.offset == Self::NULL_OFFSET
     }
 
     #[inline(always)]
-    pub unsafe fn as_ptr(&self, base: *const u8) -> *const T {
+    pub unsafe fn deref<'a>(&self, base: *const u8) -> &'a T {
         if self.is_null() {
-            core::ptr::null()
-        } else {
-            unsafe { base.add(self.offset as usize) as *const T }
+            panic!("Null pointer dereference");
         }
-    }
-
-    #[inline(always)]
-    pub unsafe fn as_ref<'a>(&self, base: *const u8) -> &'a T {
-        unsafe { &*self.as_ptr(base) }
-    }
-
-    #[cfg(not(target_os = "cuda"))]
-    pub fn new(me: *const Self, target: *const T) -> Self {
-        if target.is_null() {
-            return Self::null();
-        }
-
-        let diff = unsafe { (target as *const u8).offset_from(me as *const u8) };
-
-        if diff > i32::MAX as isize || diff < i32::MIN as isize {
-            panic!("RelPtr offset out of i32 range! Are objects too far apart?");
-        }
-
-        Self {
-            offset: diff as i32,
-            _marker: PhantomData,
+        unsafe {
+            let ptr = base.add(self.offset as usize);
+            &*(ptr as *const T)
         }
     }
 }
 
 #[repr(transparent)]
 #[derive(Debug, Clone, Copy)]
-pub struct Ptr<T>(pub *const T);
+pub struct DevicePtr<T>(pub *const T);
 
-impl<T> Default for Ptr<T> {
+impl<T> Default for DevicePtr<T> {
     fn default() -> Self {
         Self(core::ptr::null())
     }
 }
 
-impl<T> PartialEq for Ptr<T> {
+impl<T> PartialEq for DevicePtr<T> {
     #[inline(always)]
     fn eq(&self, other: &Self) -> bool {
         self.0 == other.0
     }
 }
 
-impl<T> Eq for Ptr<T> {}
+impl<T> Eq for DevicePtr<T> {}
 
-impl<T> Ptr<T> {
+impl<T> DevicePtr<T> {
     pub fn null() -> Self {
         Self::default()
     }
@@ -107,10 +86,10 @@ impl<T> Ptr<T> {
     }
 }
 
-unsafe impl<T: Sync> Send for Ptr<T> {}
-unsafe impl<T: Sync> Sync for Ptr<T> {}
+unsafe impl<T: Sync> Send for DevicePtr<T> {}
+unsafe impl<T: Sync> Sync for DevicePtr<T> {}
 
-impl<T> std::ops::Deref for Ptr<T> {
+impl<T> std::ops::Deref for DevicePtr<T> {
     type Target = T;
 
     #[inline(always)]
@@ -119,19 +98,19 @@ impl<T> std::ops::Deref for Ptr<T> {
     }
 }
 
-impl<T> From<&T> for Ptr<T> {
+impl<T> From<&T> for DevicePtr<T> {
     fn from(r: &T) -> Self {
         Self(r as *const T)
     }
 }
 
-impl<T> From<&mut T> for Ptr<T> {
+impl<T> From<&mut T> for DevicePtr<T> {
     fn from(r: &mut T) -> Self {
         Self(r as *const T)
     }
 }
 
-impl<T> Index<usize> for Ptr<T> {
+impl<T> Index<usize> for DevicePtr<T> {
     type Output = T;
 
     #[inline(always)]
@@ -142,7 +121,7 @@ impl<T> Index<usize> for Ptr<T> {
     }
 }
 
-impl<T> Index<u32> for Ptr<T> {
+impl<T> Index<u32> for DevicePtr<T> {
     type Output = T;
 
     #[inline(always)]
@@ -154,7 +133,7 @@ impl<T> Index<u32> for Ptr<T> {
 #[repr(C)]
 #[derive(Clone, Copy, Debug)]
 pub struct Slice<T> {
-    pub ptr: Ptr<T>,
+    pub ptr: DevicePtr<T>,
     pub len: u32,
     pub _marker: PhantomData<T>,
 }
@@ -163,7 +142,7 @@ unsafe impl<T: Sync> Send for Slice<T> {}
 unsafe impl<T: Sync> Sync for Slice<T> {}
 
 impl<T> Slice<T> {
-    pub fn new(ptr: Ptr<T>, len: u32) -> Self {
+    pub fn new(ptr: DevicePtr<T>, len: u32) -> Self {
         Self {
             ptr,
             len,
diff --git a/shared/src/utils/sampling.rs b/shared/src/utils/sampling.rs
index 50436c6..3389cf1 100644
--- a/shared/src/utils/sampling.rs
+++ b/shared/src/utils/sampling.rs
@@ -8,7 +8,7 @@ use crate::utils::math::{
     catmull_rom_weights, clamp, difference_of_products, evaluate_polynomial, lerp, logistic,
     newton_bisection, safe_sqrt, square, sum_of_products,
 };
-use crate::utils::ptr::Ptr;
+use crate::utils::ptr::DevicePtr;
 use crate::utils::rng::Rng;
 use crate::{
     Float, INV_2_PI, INV_4_PI, INV_PI, ONE_MINUS_EPSILON, PI, PI_OVER_2, PI_OVER_4, find_interval,
@@ -702,19 +702,19 @@ pub struct PLSample {
 
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]
-pub struct PiecewiseConstant1D {
-    pub func: Ptr<Float>,
-    pub cdf: Ptr<Float>,
+pub struct DevicePiecewiseConstant1D {
+    pub func: DevicePtr<Float>,
+    pub cdf: DevicePtr<Float>,
     pub min: Float,
     pub max: Float,
     pub n: u32,
     pub func_integral: Float,
 }
 
-unsafe impl Send for PiecewiseConstant1D {}
-unsafe impl Sync for PiecewiseConstant1D {}
+unsafe impl Send for DevicePiecewiseConstant1D {}
+unsafe impl Sync for DevicePiecewiseConstant1D {}
 
-impl PiecewiseConstant1D {
+impl DevicePiecewiseConstant1D {
     pub fn integral(&self) -> Float {
         self.func_integral
     }
@@ -742,14 +742,14 @@ impl PiecewiseConstant1D {
 
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]
-pub struct PiecewiseConstant2D {
+pub struct DevicePiecewiseConstant2D {
     pub domain: Bounds2f,
-    pub p_marginal: PiecewiseConstant1D,
+    pub p_marginal: DevicePiecewiseConstant1D,
     pub n_conditionals: usize,
-    pub p_conditional_v: Ptr<PiecewiseConstant1D>,
+    pub p_conditional_v: DevicePtr<DevicePiecewiseConstant1D>,
 }
 
-impl PiecewiseConstant2D {
+impl DevicePiecewiseConstant2D {
     pub fn resolution(&self) -> Point2i {
         Point2i::new(
             self.p_conditional_v[0u32].size() as i32,
@@ -1056,10 +1056,10 @@ pub struct PiecewiseLinear2D<const N: usize> {
     pub inv_patch_size: Vector2f,
     pub param_size: [u32; N],
     pub param_strides: [u32; N],
-    pub param_values: [Ptr<Float>; N],
-    pub data: Ptr<Float>,
-    pub marginal_cdf: Ptr<Float>,
-    pub conditional_cdf: Ptr<Float>,
+    pub param_values: [DevicePtr<Float>; N],
+    pub data: DevicePtr<Float>,
+    pub marginal_cdf: DevicePtr<Float>,
+    pub conditional_cdf: DevicePtr<Float>,
 }
 
 impl<const N: usize> PiecewiseLinear2D<N> {
@@ -1311,7 +1311,7 @@ impl<const N: usize> PiecewiseLinear2D<N> {
 
     fn lookup(
         &self,
-        data: Ptr<Float>,
+        data: DevicePtr<Float>,
         i0: u32,
         size: u32,
         param_weight: &[(Float, Float); N],
diff --git a/shared/src/utils/transform.rs b/shared/src/utils/transform.rs
index cd29345..a13db3f 100644
--- a/shared/src/utils/transform.rs
+++ b/shared/src/utils/transform.rs
@@ -7,7 +7,7 @@ use super::math::{SquareMatrix, radians, safe_acos};
 use super::quaternion::Quaternion;
 use crate::core::color::{RGB, XYZ};
 use crate::core::geometry::{
-    Bounds3f, Normal, Normal3f, Point, Point3f, Point3fi, Ray, Vector, Vector3f, Vector3fi,
+    Bounds3f, Frame, Normal, Normal3f, Point, Point3f, Point3fi, Ray, Vector, Vector3f, Vector3fi,
     VectorLike,
 };
 use crate::core::interaction::{
@@ -714,6 +714,30 @@ where
         }
     }
 }
+
+impl From<Frame> for TransformGeneric<Float> {
+    fn from(frame: Frame) -> Self {
+        let values: &[Float; 16] = &[
+            frame.x.x(),
+            frame.x.y(),
+            frame.x.z(),
+            0.,
+            frame.y.x(),
+            frame.y.y(),
+            frame.y.z(),
+            0.,
+            frame.z.x(),
+            frame.z.y(),
+            frame.z.z(),
+            0.,
+            0.,
+            0.,
+            0.,
+            1.,
+        ];
+        Self::from_flat(values).expect("Transform must be inversible")
+    }
+}
 impl From<Quaternion> for TransformGeneric<Float> {
     fn from(q: Quaternion) -> Self {
         let xx = q.v.x() * q.v.x();
diff --git a/src/core/image/io.rs b/src/core/image/io.rs
index 30cde8b..ece3215 100644
--- a/src/core/image/io.rs
+++ b/src/core/image/io.rs
@@ -1,4 +1,4 @@
-use super::ImageBuffer;
+use super::{Image, ImageAndMetadata};
 use crate::utils::error::ImageError;
 use anyhow::{Context, Result, bail};
 use exr::prelude::{read_first_rgba_layer_from_file, write_rgba_file};
@@ -6,7 +6,7 @@ use image_rs::ImageReader;
 use image_rs::{DynamicImage, ImageBuffer, Rgb, Rgba};
 use shared::Float;
 use shared::core::color::{ColorEncoding, LINEAR, SRGB};
-use shared::core::image::Image;
+use shared::core::image::DeviceImage;
 use std::fs::File;
 use std::io::{BufRead, BufReader, BufWriter, Read, Write};
 use std::path::Path;
@@ -21,7 +21,7 @@ pub trait ImageIO {
     fn to_u8_buffer(&self) -> Vec<u8>;
 }
 
-impl ImageIO for ImageBuffer {
+impl ImageIO for Image {
     fn read(path: &Path, encoding: Option<ColorEncoding>) -> Result<ImageAndMetadata> {
         let ext = path
             .extension()
@@ -206,14 +206,14 @@ fn read_generic(path: &Path, encoding: Option<ColorEncoding>) -> Result<ImageAnd
 
     // Check if it was loaded as high precision or standard
     let image = match dyn_img {
-        DynamicImage::ImageRgb32F(buf) => Image {
+        DynamicImage::ImageRgb32F(buf) => DeviceImage {
             format: PixelFormat::F32,
             resolution: res,
             channel_names: vec!["R".into(), "G".into(), "B".into()],
             encoding: LINEAR,
             pixels: PixelData::F32(buf.into_raw()),
         },
-        DynamicImage::ImageRgba32F(buf) => Image {
+        DynamicImage::ImageRgba32F(buf) => DeviceImage {
             format: PixelFormat::F32,
             resolution: res,
             channel_names: vec!["R".into(), "G".into(), "B".into(), "A".into()],
@@ -224,7 +224,7 @@ fn read_generic(path: &Path, encoding: Option<ColorEncoding>) -> Result<ImageAnd
             // Default to RGB8 for everything else
             if dyn_img.color().has_alpha() {
                 let buf = dyn_img.to_rgba8();
-                Image {
+                DeviceImage {
                     format: PixelFormat::U8,
                     resolution: res,
                     channel_names: vec!["R".into(), "G".into(), "B".into(), "A".into()],
@@ -233,7 +233,7 @@ fn read_generic(path: &Path, encoding: Option<ColorEncoding>) -> Result<ImageAnd
                 }
             } else {
                 let buf = dyn_img.to_rgb8();
-                Image {
+                DeviceImage {
                     format: PixelFormat::U8,
                     resolution: res,
                     channel_names: vec!["R".into(), "G".into(), "B".into()],
@@ -270,7 +270,7 @@ fn read_exr(path: &Path) -> Result<ImageAndMetadata> {
     let w = image.layer_data.size.width() as i32;
     let h = image.layer_data.size.height() as i32;
 
-    let image = Image {
+    let image = DeviceImage {
         format: PixelFormat::F32,
         resolution: Point2i::new(w, h),
         channel_names: vec!["R".into(), "G".into(), "B".into(), "A".into()],
@@ -355,7 +355,7 @@ fn read_pfm(path: &Path) -> Result<ImageAndMetadata> {
         vec!["R".into(), "G".into(), "B".into()]
     };
 
-    let image = Image {
+    let image = DeviceImage {
         format: PixelFormat::F32,
         resolution: Point2i::new(w, h),
         channel_names: names,
diff --git a/src/core/image/mod.rs b/src/core/image/mod.rs
index 72fbef3..7ae6c65 100644
--- a/src/core/image/mod.rs
+++ b/src/core/image/mod.rs
@@ -1,5 +1,5 @@
 use shared::core::geometry::Point2i;
-use shared::core::image::{Image, PixelFormat};
+use shared::core::image::{DeviceImage, ImageAccess, ImageBase, PixelFormat, WrapMode};
 use shared::utils::math::f16_to_f32;
 use std::ops::Deref;
 
@@ -8,6 +8,7 @@ pub mod metadata;
 pub mod ops;
 pub mod pixel;
 
+pub use io::ImageIO;
 pub use metadata::*;
 
 impl std::fmt::Display for PixelFormat {
@@ -75,39 +76,50 @@ pub enum PixelStorage {
     F32(Vec<f32>),
 }
 
-pub struct ImageBuffer {
-    pub view: Image,
+pub struct Image {
+    pub base: ImageBase,
+    pub pixels: PixelStorage,
     pub channel_names: Vec<String>,
-    _storage: PixelStorage,
 }
 
-impl Deref for ImageBuffer {
-    type Target = Image;
-    fn deref(&self) -> &Self::Target {
-        &self.view
+impl ImageAccess for Image {
+    fn get_channel_with_wrap(&self, p: Point2i, c: i32, wrap_mode: WrapMode2D) -> Float {
+        todo!()
+    }
+    fn get_channel(&self, p: Point2i, c: i32) -> Float {
+        todo!()
+    }
+    fn lookup_nearest_channel_with_wrap(&self, p: Point2f, c: i32, wrap_mode: WrapMode2D) -> Float {
+        todo!()
+    }
+    fn lookup_nearest_channel(&self, p: Point2f, c: i32) -> Float {
+        todo!()
     }
 }
 
 #[derive(Debug, Clone)]
 pub struct ImageAndMetadata {
-    pub image: ImageBuffer,
+    pub image: Image,
     pub metadata: ImageMetadata,
 }
 
-impl ImageBuffer {
-    fn resolution(&self) {
-        self.view.resolution()
+impl Image {
+    pub fn resolution(&self) -> Point2i {
+        self.base.resolution
+    }
+
+    fn n_channels(&self) -> i32 {
+        self.base.n_channels
     }
 
     pub fn new_empty() -> Self {
         Self {
             channel_names: Vec::new(),
-            _storage: PixelStorage::U8(Vec::new()),
-            view: Image {
+            pixels: PixelStorage::U8(Vec::new()),
+            base: ImageBase {
                 format: PixelFormat::U256,
                 resolution: Point2i::new(0, 0),
                 n_channels: 0,
-                pixels: Pixels::U8(std::ptr::null()),
                 encoding: ColorEncoding::default(),
             },
         }
@@ -120,23 +132,22 @@ impl ImageBuffer {
         encoding: ColorEncoding,
     ) -> Self {
         let n_channels = channel_names.len() as i32;
-        let (format, pixels_view) = match &storage {
+        let (format, pixels) = match &storage {
             PixelStorage::U8(vec) => (PixelFormat::U8, ImagePixels::U8(vec.as_ptr())),
             PixelStorage::F16(vec) => (PixelFormat::F16, ImagePixels::F16(vec.as_ptr())),
             PixelStorage::F32(vec) => (PixelFormat::F32, ImagePixels::F32(vec.as_ptr())),
         };
 
-        let view = Image {
+        let base = ImageBase {
             format,
             resolution,
             n_channels,
             encoding,
-            pixels: pixels_view,
         };
 
         Self {
-            view,
-            _storage: storage,
+            base,
+            pixels,
             channel_names,
         }
     }
@@ -165,18 +176,17 @@ impl ImageBuffer {
             _ => unreachable!(),
         };
 
-        let view = Image {
+        let base = ImageBase {
             format: PixelFormat::U256,
             resolution,
             n_channels,
-            pixels: Pixels::U8(ptr),
             encoding: encoding.clone(),
         };
 
         Self {
-            view,
+            base,
             channel_names,
-            _storage: storage,
+            pixels: ptr,
         }
     }
 
@@ -205,18 +215,17 @@ impl ImageBuffer {
             _ => unreachable!(),
         };
 
-        let view = Image {
+        let base = ImageBase {
             format: PixelFormat::U256,
             resolution,
             n_channels,
-            pixels: Pixels::U8(ptr),
             encoding: encoding.clone(),
         };
 
         Self {
-            view,
+            base,
             channel_names,
-            _storage: storage,
+            pixels: ptr,
         }
     }
 
@@ -235,18 +244,17 @@ impl ImageBuffer {
             _ => unreachable!(),
         };
 
-        let view = Image {
+        let base = ImageBase {
             format: PixelFormat::Half,
             resolution,
             n_channels,
-            pixels: Pixels::F16(ptr),
             encoding: ColorEncoding::default(),
         };
 
         Self {
-            view,
+            base,
             channel_names,
-            _storage: storage,
+            pixels: ptr,
         }
     }
 
@@ -265,18 +273,17 @@ impl ImageBuffer {
             _ => unreachable!(),
         };
 
-        let view = Image {
+        let base = ImageBase {
             format: PixelFormat::Float,
             resolution,
             n_channels,
-            pixels: Pixels::F32(ptr),
             encoding: ColorEncoding::default(),
         };
 
         Self {
-            view,
+            base,
             channel_names,
-            _storage: storage,
+            pixels: ptr,
         }
     }
 
@@ -412,6 +419,16 @@ impl ImageBuffer {
         ImageChannelValues(values)
     }
 
+    pub fn get_channel_with_wrap(
+        &self,
+        p: Point2i,
+        c: i32,
+        wrap_mode: Option<WrapMode2D>,
+    ) -> Float {
+        // if !self.remap_pixel_coords
+        0.
+    }
+
     pub fn channel_names_from_desc(&self, desc: &ImageChannelDesc) -> Vec<&str> {
         desc.offset
             .iter()
@@ -566,9 +583,9 @@ impl ImageBuffer {
     pub fn mse(
         &self,
         desc: ImageChannelDesc,
-        ref_img: &Image,
+        ref_img: &DeviceImage,
         generate_mse_image: bool,
-    ) -> (ImageChannelValues, Option<Image>) {
+    ) -> (ImageChannelValues, Option<DeviceImage>) {
         let mut sum_se: Vec<f64> = vec![0.; desc.size()];
         let names_ref = self.channel_names_from_desc(&desc);
         let ref_desc = ref_img
@@ -613,7 +630,7 @@ impl ImageBuffer {
             sum_se.iter().map(|&s| (s / pixel_count) as Float).collect();
 
         let mse_image = if generate_mse_image {
-            Some(Image::new(
+            Some(DeviceImage::new(
                 PixelFormat::F32,
                 self.resolution,
                 &names_ref,
@@ -633,4 +650,21 @@ impl ImageBuffer {
             PixelStorage::F32(vec) => Pixels::F32(vec.as_ptr()),
         };
     }
+
+    pub fn has_any_infinite_pixels(&self) -> bool {
+        if format == PixelFormat::Float {
+            return false;
+        }
+
+        for y in 0..self.resolution().y() {
+            for x in 0..self.resolution().x() {
+                for c in 0..self.n_channels() {
+                    if self.get_channel(Point2i::new(x, y), c).is_infinite() {
+                        return true;
+                    }
+                }
+            }
+        }
+        return false;
+    }
 }
diff --git a/src/core/image/ops.rs b/src/core/image/ops.rs
index f4b1770..11b63cd 100644
--- a/src/core/image/ops.rs
+++ b/src/core/image/ops.rs
@@ -1,5 +1,5 @@
 // use rayon::prelude::*;
-use super::ImageBuffer;
+use super::Image;
 use rayon::prelude::*;
 use shared::Float;
 use shared::core::geometry::{Bounds2i, Point2i};
@@ -13,7 +13,7 @@ pub struct ResampleWeight {
     pub weight: [Float; 4],
 }
 
-impl ImageBuffer {
+impl Image {
     pub fn flip_y(&mut self) {
         let res = self.resolution;
         let nc = self.n_channels();
diff --git a/src/core/light.rs b/src/core/light.rs
index 8497421..4fbf6c7 100644
--- a/src/core/light.rs
+++ b/src/core/light.rs
@@ -1,31 +1,191 @@
 use shared::core::geometry::{Bounds3f, Point2i};
-use shared::core::image::Image;
-use shared::core::light::LightBase;
+use shared::core::image::DeviceImage;
+use shared::core::light::{Light, LightBase};
 use shared::core::medium::MediumInterface;
 use shared::core::spectrum::Spectrum;
-use shared::spectra::{DenselySampledSpectrum, SampledSpectrum, SampledWavelengths};
-use shared::utils::Transform;
+use shared::core::texture::SpectrumType;
+use shared::lights::{
+    DistantLight, GoniometricLight, InfiniteUniformLight, PointLight, ProjectionLight, SpotLight,
+};
+use shared::spectra::{DenselySampledSpectrum, RGBColorSpace, SampledSpectrum, SampledWavelengths};
+use shared::utils::{Ptr, Transform};
 use shared::{Float, PI};
 
-use crate::core::spectrum::SPECTRUM_CACHE;
+use crate::core::spectrum::{SPECTRUM_CACHE, spectrum_to_photometric};
+use crate::lights::*;
 use crate::utils::containers::InternCache;
+use crate::utils::{Arena, ParameterDictionary, Upload, resolve_filename};
 
-pub trait LightBaseTrait {
-    pub fn lookup_spectrum(s: &Spectrum) -> DenselySampledSpectrum {
-        let cache = SPECTRUM_CACHE.get_or_init(InternCache::new);
-        let dense_spectrum = DenselySampledSpectrum::from_spectrum(s);
-        cache.lookup(dense_spectrum).as_ref()
-    }
+pub fn lookup_spectrum(s: &Spectrum) -> DenselySampledSpectrum {
+    let cache = SPECTRUM_CACHE.get_or_init(InternCache::new);
+    let dense_spectrum = DenselySampledSpectrum::from_spectrum(s);
+    cache.lookup(dense_spectrum).as_ref()
 }
 
-impl LightBaseTrait for LightBase {}
-
-pub trait LightFactory {
+pub trait CreateLight {
     fn new(
         render_from_light: Transform,
         medium_interface: MediumInterface,
+        le: Spectrum,
         scale: Float,
-        iemit: &Spectrum,
-        image: &Image,
+        shape: Option<Ptr<Shape>>,
+        alpha: Option<Ptr<FloatTexture>>,
+        image: Option<Ptr<Image>>,
+        image_color_space: Option<Ptr<RGBColorSpace>>,
+        two_sided: Option<bool>,
+        fov: Option<Float>,
+        cos_fallof_start: Option<Float>,
+        total_width: Option<Float>,
+    ) -> Self;
+
+    fn create(
+        arena: &mut Arena,
+        render_from_light: Transform,
+        medium: Medium,
+        parameters: &ParameterDictionary,
+        loc: &FileLoc,
+        shape: &Shape,
+        alpha_tex: &FloatTexture,
+        colorspace: Option<&RGBColorSpace>,
+    ) -> Light;
+}
+
+pub trait LightFactory {
+    fn create(
+        name: &str,
+        arena: &mut Arena,
+        render_from_light: Transform,
+        medium: Medium,
+        parameters: &ParameterDictionary,
+        loc: &FileLoc,
+        shape: &Shape,
+        alpha_tex: &FloatTexture,
+        colorspace: Option<&RGBColorSpace>,
     ) -> Self;
 }
+
+impl LightFactory for Light {
+    fn create(
+        name: &str,
+        arena: &mut Arena,
+        render_from_light: Transform,
+        medium: Medium,
+        parameters: &ParameterDictionary,
+        loc: &FileLoc,
+        shape: &Shape,
+        alpha_tex: &FloatTexture,
+        colorspace: Option<&RGBColorSpace>,
+    ) -> Self {
+        match name {
+            "point" => PointLight::create(
+                arena,
+                render_from_light,
+                medium,
+                parameters,
+                loc,
+                shape,
+                alpha_tex,
+                colorspace,
+            ),
+            "spot" => SpotLight::create(
+                arena,
+                render_from_light,
+                medium,
+                parameters,
+                loc,
+                shape,
+                alpha_tex,
+                colorspace,
+            ),
+            "goniometric" => GoniometricLight::create(
+                arena,
+                render_from_light,
+                medium,
+                parameters,
+                loc,
+                shape,
+                alpha_tex,
+                colorspace,
+            ),
+            "projection" => ProjectionLight::create(
+                arena,
+                render_from_light,
+                medium,
+                parameters,
+                loc,
+                shape,
+                alpha_tex,
+                colorspace,
+            ),
+            "distant" => DistantLight::create(
+                arena,
+                render_from_light,
+                medium,
+                parameters,
+                loc,
+                shape,
+                alpha_tex,
+                colorspace,
+            ),
+            "infinite" => {
+                let colorspace = parameters.color_space.unwrap();
+                let l = parameters.get_spectrum_array("L", SpectrumType::Illuminant);
+                let mut scale = parameters.get_one_float("scale", 1.);
+                let portal = parameters.get_point3f_array("portal");
+                let filename = resolve_filename(parameters.get_one_string("filename", ""));
+                let e_v = parameters.get_one_float("illuminance", -1.);
+                if l.is_empty() && filename.is_empty() && portal.is_empty() {
+                    if e_v > 0. {
+                        let k_e = PI;
+                        scale *= e_v / k_e;
+                    }
+                    let specific = InfiniteUniformLight::new(
+                        render_from_light,
+                        medium_interface,
+                        arena.alloc(le),
+                        scale,
+                        None,
+                        None,
+                        None,
+                        None,
+                        None,
+                        None,
+                        None,
+                        None,
+                    );
+                    arena.alloc(specific);
+                    return Light::InfiniteUniform(specific);
+                } else if !l.is_empty() && portal.is_empty() {
+                    if !filename.is_empty() {
+                        panic!(
+                            "{}: Both \"L\" and \"filename\" specified for DiffuseAreaLight.",
+                            loc
+                        );
+                    }
+                    scale /= spectrum_to_photometric(l[0]);
+                    if e_v > 0. {
+                        let k_e = PI;
+                        scale *= e_v / k_e;
+                    }
+                    let specific = InfiniteUniformLight::new(
+                        render_from_light,
+                        medium_interface,
+                        arena.alloc(le),
+                        scale,
+                        None,
+                        None,
+                        None,
+                        None,
+                        None,
+                        None,
+                        None,
+                        None,
+                    );
+
+                    arena.alloc(specific);
+                    return Light::InfiniteUniform(specific);
+                }
+            }
+        }
+    }
+}
diff --git a/src/core/material.rs b/src/core/material.rs
index 65f0ac2..873d9dd 100644
--- a/src/core/material.rs
+++ b/src/core/material.rs
@@ -1,4 +1,4 @@
-use crate::core::image::ImageBuffer;
+use crate::core::image::Image;
 use crate::utils::error::FileLoc;
 use crate::utils::parameters::ParameterDictionary;
 use shared::core::material::Material;
@@ -8,7 +8,7 @@ use std::collections::HashMap;
 pub trait CreateMaterial: Sized {
     fn create(
         parameters: &TextureParameterDictionary,
-        normal_map: Option<Arc<ImageBuffer>>,
+        normal_map: Option<Arc<Image>>,
         named_materials: &HashMap<String, Material>,
         loc: &FileLoc,
     ) -> Self;
@@ -35,7 +35,7 @@ pub trait MaterialFactory {
     fn create(
         name: &str,
         params: &TextureParameterDictionary,
-        normal_map: Arc<ImageBuffer>,
+        normal_map: Arc<Image>,
         named_materials: HashMap<String, Material>,
         loc: &FileLoc,
     ) -> Result<Self, String>;
diff --git a/src/core/scene.rs b/src/core/scene.rs
index 9e62180..80d7c6d 100644
--- a/src/core/scene.rs
+++ b/src/core/scene.rs
@@ -1,5 +1,5 @@
 use crate::core::filter::FilterFactory;
-use crate::core::image::{ImageBuffer, io::ImageIO};
+use crate::core::image::{Image, io::ImageIO};
 use crate::core::texture::SpectrumTexture;
 use crate::utils::parallel::{AsyncJob, run_async};
 use crate::utils::parameters::{
@@ -694,7 +694,7 @@ impl BasicScene {
         let job = crate::parallel::run_async(move || {
             let path = std::path::Path::new(&filename_clone);
 
-            let immeta = ImageBuffer::read(path, Some(ColorEncoding::Linear))
+            let immeta = Image::read(path, Some(ColorEncoding::Linear))
                 .unwrap_or_else(|e| panic!("{}: unable to read normal map: {}", filename_clone, e));
 
             let image = &immeta.image;
diff --git a/src/core/shape.rs b/src/core/shape.rs
index 4b0a3b1..e81ffe2 100644
--- a/src/core/shape.rs
+++ b/src/core/shape.rs
@@ -1,6 +1,6 @@
 use crate::core::texture::FloatTexture;
 use crate::shapes::TriQuadMesh;
-use crate::utils::{FileLoc, ParameterDictionary, resolve_filename};
+use crate::utils::{Arena, FileLoc, ParameterDictionary, resolve_filename};
 use shared::core::options::get_options;
 use shared::core::shape::*;
 use shared::shapes::*;
@@ -21,6 +21,7 @@ pub trait CreateShape {
         parameters: ParameterDictionary,
         float_textures: HashMap<String, FloatTexture>,
         loc: FileLoc,
+        arena: &mut Arena,
     ) -> Vec<Shape>;
 }
 
@@ -33,6 +34,7 @@ pub trait ShapeFactory {
         parameters: ParameterDictionary,
         float_textures: HashMap<String, FloatTexture>,
         loc: FileLoc,
+        arena: &mut Arena,
     ) -> Vec<Shape>;
 }
 
@@ -45,6 +47,7 @@ impl ShapeFactory for Shape {
         parameters: ParameterDictionary,
         float_textures: HashMap<String, FloatTexture>,
         loc: FileLoc,
+        arena: &mut Arena,
     ) -> Vec<Shape> {
         match name {
             "sphere" => SphereShape::create(
@@ -55,6 +58,7 @@ impl ShapeFactory for Shape {
                 parameters,
                 float_textures,
                 loc,
+                arena,
             ),
             "cylinder" => CylinderShape::create(
                 name,
@@ -64,6 +68,7 @@ impl ShapeFactory for Shape {
                 parameters,
                 float_textures,
                 loc,
+                arena,
             ),
             "disk" => DiskShape::create(
                 name,
@@ -73,6 +78,7 @@ impl ShapeFactory for Shape {
                 parameters,
                 float_textures,
                 loc,
+                arena,
             ),
             "bilinearmesh" => BilinearPatchShape::create(
                 name,
@@ -82,6 +88,7 @@ impl ShapeFactory for Shape {
                 parameters,
                 float_textures,
                 loc,
+                arena,
             ),
             "trianglemesh" => TriangleShape::create(
                 name,
@@ -91,6 +98,7 @@ impl ShapeFactory for Shape {
                 parameters,
                 float_textures,
                 loc,
+                arena,
             ),
             "plymesh" => {
                 let filename = resolve_filename(parameters.get_one_string("filename", ""));
diff --git a/src/core/spectrum.rs b/src/core/spectrum.rs
index 4fc51e1..3114e40 100644
--- a/src/core/spectrum.rs
+++ b/src/core/spectrum.rs
@@ -1,4 +1,9 @@
+use crate::core::light::LightBaseTrait;
+use crate::spectra::cie_y;
 use crate::utils::containers::InternCache;
+use shared::Float;
+use shared::core::light::LightBase;
+use shared::core::spectrum::Spectrum;
 
 pub static SPECTRUM_CACHE: Lazy<Mutex<HashMap<String, Spectrum>>> =
     Lazy::new(|| Mutex::new(HashMap::new()));
@@ -6,3 +11,11 @@ pub static SPECTRUM_CACHE: Lazy<Mutex<HashMap<String, Spectrum>>> =
 fn get_spectrum_cache() -> &'static InternCache<DenselySampledSpectrum> {
     SPECTRUM_CACHE.get_or_init(InternCache::new)
 }
+
+pub fn spectrum_to_photometric(s: Spectrum) -> Float {
+    let effective_spectrum = match s {
+        Spectrum::RGBIlluminant(ill) => &Spectrum::Dense(ill.illuminant),
+        _ => s,
+    };
+    effective_spectrum.inner_product(cie_y)
+}
diff --git a/src/materials/coated.rs b/src/materials/coated.rs
index ee3a345..6aceb7f 100644
--- a/src/materials/coated.rs
+++ b/src/materials/coated.rs
@@ -1,6 +1,6 @@
-use crate::core::image::ImageBuffer;
+use crate::core::image::Image;
 use crate::core::material::CreateMaterial;
-use crate::utils::parameters::ParameterDictionary;
+use crate::utils::{Arena, ParameterDictionary};
 use shared::core::spectrum::Spectrum;
 use shared::core::texture::SpectrumType;
 use shared::materials::coated::*;
@@ -10,9 +10,10 @@ use shared::textures::SpectrumConstantTexture;
 impl CreateMaterial for CoatedDiffuseMaterial {
     fn create(
         parameters: &TextureParameterDictionary,
-        normal_map: Option<Arc<ImageBuffer>>,
+        normal_map: Option<Arc<Image>>,
         named_materials: &HashMap<String, Material>,
         loc: &FileLoc,
+        area: &mut Arena,
     ) -> Self {
         let reflectance = parameters
             .get_spectrum_texture("reflectance", None, SpectrumType::Albedo)
@@ -45,15 +46,30 @@ impl CreateMaterial for CoatedDiffuseMaterial {
             });
         let displacement = parameters.get_float_texture("displacement");
         let remap_roughness = parameters.get_one_bool("remaproughness", true);
+        arena.alloc(Self::new(
+            reflectance,
+            u_roughness,
+            v_roughness,
+            thickness,
+            albedo,
+            g,
+            eta,
+            displacement,
+            normal_map,
+            remap_roughness,
+            max_depth,
+            n_samples,
+        ));
     }
 }
 
 impl CreateMaterial for CoatedConductorMaterial {
     fn create(
         parameters: &TextureParameterDictionary,
-        normal_map: Option<Arc<ImageBuffer>>,
+        normal_map: Option<Arc<Image>>,
         named_materials: &HashMap<String, Material>,
         loc: &FileLoc,
+        arena: &mut Arena,
     ) -> Result<Self, String> {
         let interface_u_roughness = parameters
             .get_float_texture_or_null("interface.uroughness")
@@ -106,7 +122,7 @@ impl CreateMaterial for CoatedConductorMaterial {
             });
         let displacement = parameters.get_float_texture_or_null("displacement");
         let remap_roughness = parameters.get_one_bool("remaproughness", true);
-        Self::new(
+        let material = Self::new(
             displacement,
             normal_map,
             interface_u_roughness,
@@ -123,6 +139,8 @@ impl CreateMaterial for CoatedConductorMaterial {
             remap_roughness,
             max_depth,
             n_samples,
-        )
+        );
+        arena.alloc(material);
+        return material;
     }
 }
diff --git a/src/materials/complex.rs b/src/materials/complex.rs
index 089aed5..53b3839 100644
--- a/src/materials/complex.rs
+++ b/src/materials/complex.rs
@@ -1,4 +1,5 @@
 use crate::core::material::CreateMaterial;
+use crate::utils::{Arena, FileLoc, TextureParameterDictionary};
 use shared::core::bxdf::HairBxDF;
 use shared::core::spectrum::Spectrum;
 use shared::core::texture::{GPUFloatTexture, GPUSpectrumTexture};
@@ -10,6 +11,7 @@ impl CreateMaterial for HairMaterial {
         normal_map: Option<Arc<ImageBuffer>>,
         named_materials: &HashMap<String, Material>,
         loc: &FileLoc,
+        arena: &mut Arena,
     ) -> Result<Self, String> {
         let sigma_a = parameters.get_spectrum_texture_or_null("sigma_a", SpectrumType::Unbounded);
         let reflectance = parameters
@@ -57,7 +59,7 @@ impl CreateMaterial for HairMaterial {
         let beta_m = parameters.get_float_texture("beta_m", 0.3);
         let beta_n = parameters.get_float_texture("beta_n", 0.3);
         let alpha = parameters.get_float_texture("alpha", 2.);
-        HairMaterial::new(
+        let material = HairMaterial::new(
             sigma_a,
             reflectance,
             eumelanin,
@@ -66,7 +68,10 @@ impl CreateMaterial for HairMaterial {
             beta_m,
             beta_n,
             alpha,
-        )
+        );
+
+        arena.alloc(material);
+        return material;
     }
 }
 
diff --git a/src/shapes/bilinear.rs b/src/shapes/bilinear.rs
index 3cb71fb..3e561a4 100644
--- a/src/shapes/bilinear.rs
+++ b/src/shapes/bilinear.rs
@@ -1,11 +1,12 @@
-use crate::core::shape::{ALL_BILINEAR_MESHES, CreateShape};
+use crate::core::shape::{ALL_BILINEAR_MESHES, CreateMesh, CreateShape};
 use crate::core::texture::FloatTexture;
-use crate::shapes::mesh::BilinearPatchMeshHost;
-use crate::utils::{FileLoc, ParameterDictionary};
+use crate::shapes::mesh::Mesh;
+use crate::utils::{Arena, FileLoc, ParameterDictionary};
 use shared::shapes::BilinearPatchShape;
 use shared::utils::Transform;
+use std::collections::HashMap;
 
-impl CreateShape for BilinearPatchShape {
+impl CreateMesh for BilinearPatchShape {
     fn create(
         render_from_object: &Transform,
         _object_from_render: &Transform,
@@ -13,6 +14,7 @@ impl CreateShape for BilinearPatchShape {
         parameters: &ParameterDictionary,
         _float_textures: &HashMap<String, FloatTexture>,
         _loc: &FileLoc,
+        arena: &mut Arena,
     ) -> Result<Mesh, String> {
         let mut vertex_indices = parameters.get_int_array("indices");
         let mut p = parameters.get_point3f_array("P");
@@ -128,6 +130,7 @@ impl CreateShape for BilinearPatchShape {
                 rectangle: false,
             }));
         }
+        arena.alloc(shapes);
         Ok(shapes)
     }
 }
diff --git a/src/shapes/curves.rs b/src/shapes/curves.rs
index bee1949..3aa3191 100644
--- a/src/shapes/curves.rs
+++ b/src/shapes/curves.rs
@@ -194,6 +194,7 @@ impl CreateShape for CurveShape {
 
             curves.extend(new_curves);
         }
+        arena.alloc(curves);
         Ok(curves)
     }
 }
diff --git a/src/shapes/cylinder.rs b/src/shapes/cylinder.rs
index 92df50b..c8d14b5 100644
--- a/src/shapes/cylinder.rs
+++ b/src/shapes/cylinder.rs
@@ -1,6 +1,6 @@
 use crate::core::shape::CreateShape;
 use crate::core::texture::FloatTexture;
-use crate::utils::{FileLoc, ParameterDictionary};
+use crate::utils::{Arena, FileLoc, ParameterDictionary};
 use shared::core::shape::Shape;
 use shared::shapes::CylinderShape;
 use shared::utils::Transform;
@@ -15,6 +15,7 @@ impl CreateShape for CylinderShape {
         parameters: ParameterDictionary,
         float_textures: HashMap<String, FloatTexture>,
         loc: FileLoc,
+        arena: &mut Arena,
     ) -> Result<Vec<Shape>, String> {
         let radius = parameters.get_one_float("radius", 1.);
         let z_min = parameters.get_one_float("zmin", -1.);
@@ -30,6 +31,7 @@ impl CreateShape for CylinderShape {
             phi_max,
         );
 
+        arena.alloc(Shape::Cylinder(shape));
         Ok(vec![Shape::Cylinder(shape)])
     }
 }
diff --git a/src/shapes/disk.rs b/src/shapes/disk.rs
index 41369b1..49b9c06 100644
--- a/src/shapes/disk.rs
+++ b/src/shapes/disk.rs
@@ -1,6 +1,6 @@
 use crate::core::shape::CreateShape;
 use crate::core::texture::FloatTexture;
-use crate::utils::{FileLoc, ParameterDictionary};
+use crate::utils::{Arena, FileLoc, ParameterDictionary};
 use shared::core::shape::Shape;
 use shared::shapes::DiskShape;
 use shared::utils::Transform;
@@ -15,6 +15,7 @@ impl CreateShape for DiskShape {
         parameters: ParameterDictionary,
         float_textures: HashMap<String, FloatTexture>,
         loc: FileLoc,
+        arena: &mut Arena,
     ) -> Result<Vec<Shape>, String> {
         let height = parameters.get_one_float("height", 0.);
         let radius = parameters.get_one_float("radius", 1.);
@@ -30,6 +31,7 @@ impl CreateShape for DiskShape {
             reverse_orientation,
         );
 
+        arena.alloc(Shape::Disk(shape));
         Ok(vec![Shape::Disk(shape)])
     }
 }
diff --git a/src/shapes/mesh.rs b/src/shapes/mesh.rs
index 6abd8fc..9420c01 100644
--- a/src/shapes/mesh.rs
+++ b/src/shapes/mesh.rs
@@ -3,7 +3,7 @@ use ply_rs::parser::Parser;
 use ply_rs::ply::{DefaultElement, Property};
 use shared::utils::Transform;
 use shared::utils::mesh::{BilinearPatchMesh, TriangleMesh};
-use shared::utils::sampling::PiecewiseConstant2D;
+use shared::utils::sampling::DevicePiecewiseConstant2D;
 use std::collections::HashMap;
 use std::fs::File;
 use std::path::Path;
@@ -211,40 +211,32 @@ impl TriQuadMesh {
     }
 }
 
-#[derive(Debug, Clone, Copy)]
-pub struct TriangleMeshStorage {
-    vertex_indices: Vec<u32>,
-    p: Vec<Point3f>,
-    n: Vec<Normal3f>,
-    s: Vec<Vector3f>,
-    uv: Vec<Point2f>,
-    face_indices: Vec<u32>,
-}
-
-#[derive(Debug, Clone, Copy)]
-pub struct TriangleMeshHost {
-    pub view: TriangleMesh,
-    _storage: Arc<TriangleMeshStorage>,
-}
-
-impl Deref for TriangleMeshHost {
-    type Target = TriangleMesh;
-    fn deref(&self) -> &Self::Target {
-        &self.view
-    }
-}
-
-impl TriangleMeshHost {
-    pub fn new(
-        render_from_object: Transform,
+pub trait TriangleMeshFactory {
+    fn create(
+        arena: &mut Arena,
+        render_from_object: &Transform,
         reverse_orientation: bool,
-        vertex_indices: Vec<usize>,
-        mut p: Vec<Point3f>,
-        mut s: Vec<Vector3f>,
-        mut n: Vec<Normal3f>,
+        vertex_indices: Vec<u32>,
+        p: Vec<Point3f>,
+        n: Vec<Normal3f>,
+        s: Vec<Vector3f>,
         uv: Vec<Point2f>,
-        face_indices: Vec<usize>,
-    ) -> Self {
+        face_indices: Vec<u32>,
+    ) -> ArenaPtr<TriangleMesh>;
+}
+
+impl TriangleMeshFactory for TriangleMesh {
+    fn create(
+        arena: &mut Arena,
+        render_from_object: &Transform,
+        reverse_orientation: bool,
+        vertex_indices: Vec<u32>,
+        p: Vec<Point3f>,
+        n: Vec<Normal3f>,
+        s: Vec<Vector3f>,
+        uv: Vec<Point2f>,
+        face_indices: Vec<u32>,
+    ) -> ArenaPtr<TriangleMesh> {
         let n_triangles = indices.len() / 3;
         let n_vertices = p.len();
         for pt in p.iter_mut() {
@@ -342,7 +334,7 @@ pub struct BilinearMeshStorage {
     p: Vec<Point3f>,
     n: Vec<Normal3f>,
     uv: Vec<Point2f>,
-    image_distribution: Option<PiecewiseConstant2D>,
+    image_distribution: Option<DevicePiecewiseConstant2D>,
 }
 
 #[derive(Debug, Clone, Copy)]
@@ -366,7 +358,7 @@ impl BilinearPatchMeshHost {
         mut p: Vec<Point3f>,
         mut n: Vec<Normal3f>,
         uv: Vec<Point2f>,
-        image_distribution: Option<PiecewiseConstant2D>,
+        image_distribution: Option<DevicePiecewiseConstant2D>,
     ) -> Self {
         let n_patches = indices.len() / 3;
         let n_vertices = p.len();
diff --git a/src/shapes/sphere.rs b/src/shapes/sphere.rs
index 4cc1667..f98f94f 100644
--- a/src/shapes/sphere.rs
+++ b/src/shapes/sphere.rs
@@ -1,6 +1,6 @@
 use crate::core::shape::CreateShape;
 use crate::core::texture::FloatTexture;
-use crate::utils::{FileLoc, ParameterDictionary};
+use crate::utils::{Arena, FileLoc, ParameterDictionary};
 use shared::core::shape::Shape;
 use shared::shapes::SphereShape;
 use shared::utils::Transform;
@@ -14,6 +14,7 @@ impl CreateShape for SphereShape {
         parameters: ParameterDictionary,
         float_textures: HashMap<String, FloatTexture>,
         loc: FileLoc,
+        arena: &mut Arena,
     ) -> Result<Vec<Shape>, String> {
         let radius = parameters.get_one_float("radius", 1.);
         let zmin = parameters.get_one_float("zmin", -radius);
@@ -28,6 +29,7 @@ impl CreateShape for SphereShape {
             zmax,
             phimax,
         );
+        arena.alloc(vec![Shape::Sphere(SphereShape)]);
         Ok(vec![Shape::Sphere(SphereShape)])
     }
 }
diff --git a/src/shapes/triangle.rs b/src/shapes/triangle.rs
index 9d9ddaa..2bc32b7 100644
--- a/src/shapes/triangle.rs
+++ b/src/shapes/triangle.rs
@@ -1,7 +1,7 @@
 use crate::core::shape::{ALL_TRIANGLE_MESHES, CreateShape};
 use crate::core::texture::FloatTexture;
 use crate::shapes::mesh::TriangleMeshHost;
-use crate::utils::{FileLoc, ParameterDictionary};
+use crate::utils::{Arena, FileLoc, ParameterDictionary};
 use shared::shapes::TriangleShape;
 use shared::utils::Transform;
 
@@ -12,6 +12,7 @@ impl CreateShape for TriangleShape {
         reverse_orientation: bool,
         parameters: ParameterDictionary,
         loc: FileLoc,
+        arena: &mut Arena,
     ) -> Result<Mesh, String> {
         let mut vertex_indices = parameters.get_int_array("indices");
         let mut p = parameters.get_point3f_array("P");
@@ -104,6 +105,8 @@ impl CreateShape for TriangleShape {
                 tri_index: i,
             }));
         }
+
+        arena.alloc(shapes);
         Ok(shapes)
     }
 }
diff --git a/src/textures/image.rs b/src/textures/image.rs
index d106289..bda13ab 100644
--- a/src/textures/image.rs
+++ b/src/textures/image.rs
@@ -134,7 +134,7 @@ impl SpectrumTextureTrait for SpectrumImageTexture {
 
 #[derive(Debug, Clone)]
 pub struct FloatImageTexture {
-    base: ImageTextureBase,
+    pub base: ImageTextureBase,
 }
 
 impl FloatImageTexture {
diff --git a/src/textures/mix.rs b/src/textures/mix.rs
index c565da9..1f72fc9 100644
--- a/src/textures/mix.rs
+++ b/src/textures/mix.rs
@@ -1,16 +1,16 @@
 use crate::core::texture::{
     FloatTexture, FloatTextureTrait, SpectrumTexture, SpectrumTextureTrait,
 };
-use crate::utils::{FileLoc, TextureParameterDictionary};
+use crate::utils::{Arena, FileLoc, TextureParameterDictionary};
 use shared::core::geometry::Vector3f;
 use shared::utils::Transform;
 use std::sync::Arc;
 
 #[derive(Debug, Clone)]
 pub struct FloatMixTexture {
-    tex1: Arc<FloatTexture>,
-    tex2: Arc<FloatTexture>,
-    amount: Arc<FloatTexture>,
+    pub tex1: Arc<FloatTexture>,
+    pub tex2: Arc<FloatTexture>,
+    pub amount: Arc<FloatTexture>,
 }
 
 impl FloatMixTexture {
@@ -26,11 +26,12 @@ impl FloatMixTexture {
         _render_from_texture: &Transform,
         params: &TextureParameterDictionary,
         _loc: &FileLoc,
+        arena: &mut Arena,
     ) -> Self {
         let tex1 = params.get_float_texture("tex1", 0.);
         let tex2 = params.get_float_texture("tex2", 1.);
         let amount = params.get_float_texture("amount", 0.5);
-        Self::new(tex1, tex2, amount)
+        arena.alloc(Self::new(tex1, tex2, amount))
     }
 }
 
@@ -51,9 +52,9 @@ impl FloatTextureTrait for FloatMixTexture {
 
 #[derive(Debug, Clone)]
 pub struct FloatDirectionMixTexture {
-    tex1: Arc<FloatTexture>,
-    tex2: Arc<FloatTexture>,
-    dir: Vector3f,
+    pub tex1: Arc<FloatTexture>,
+    pub tex2: Arc<FloatTexture>,
+    pub dir: Vector3f,
 }
 
 impl FloatDirectionMixTexture {
@@ -65,12 +66,13 @@ impl FloatDirectionMixTexture {
         render_from_texture: &Transform,
         params: &TextureParameterDictionary,
         _loc: &FileLoc,
+        arena: &mut Arena,
     ) -> Self {
         let dir_raw = params.get_one_vector3f("dir", Vector3f::new(0., 1., 0.));
         let dir = render_from_texture.apply_to_vector(dir_raw).normalize();
         let tex1 = params.get_float_texture("tex1", 0.);
         let tex2 = params.get_float_texture("tex2", 1.);
-        Self::new(tex1, tex2, dir)
+        arena.alloc(Self::new(tex1, tex2, dir))
     }
 }
 
diff --git a/src/textures/ptex.rs b/src/textures/ptex.rs
index e80202d..115b7cc 100644
--- a/src/textures/ptex.rs
+++ b/src/textures/ptex.rs
@@ -1,4 +1,4 @@
-use crate::utils::{FileLoc, TextureParameterDictionary};
+use crate::utils::{Arena, FileLoc, TextureParameterDictionary};
 use shared::core::texture::{SpectrumType, TextureEvalContext};
 use shared::spectra::ColorEncoding;
 use shared::spectra::color::RGB;
diff --git a/src/textures/scaled.rs b/src/textures/scaled.rs
index 98eb25e..247fca7 100644
--- a/src/textures/scaled.rs
+++ b/src/textures/scaled.rs
@@ -1,15 +1,15 @@
 use crate::core::texture::{
     FloatTexture, FloatTextureTrait, SpectrumTexture, SpectrumTextureTrait,
 };
-use crate::utils::{FileLoc, TextureParameterDictionary};
+use crate::utils::{Arena, FileLoc, TextureParameterDictionary};
 use shared::core::texture::TextureEvalContext;
 use shared::spectra::{SampledSpectrum, SampledWavelengths};
 use shared::utils::Transform;
 
 #[derive(Debug, Clone)]
 pub struct FloatScaledTexture {
-    tex: Arc<FloatTexture>,
-    scale: Arc<FloatTexture>,
+    pub tex: Arc<FloatTexture>,
+    pub scale: Arc<FloatTexture>,
 }
 
 impl FloatScaledTexture {
@@ -21,6 +21,7 @@ impl FloatScaledTexture {
         _render_from_texture: &Transform,
         params: &TextureParameterDictionary,
         _loc: &FileLoc,
+        arena: &mut Arena,
     ) -> FloatTexture {
         let mut tex = params.get_float_texture("tex", 1.);
         let mut scale = params.get_float_texture("scale", 1.);
@@ -40,6 +41,7 @@ impl FloatScaledTexture {
             std::mem::swap(&mut tex, &mut scale);
         }
         std::mem::swap(&mut tex, &mut scale);
+        arena.alloc(FloatScaledTexture::new(tex, scale));
         FloatTexture::FloatScaled(FloatScaledTexture::new(tex, scale))
     }
 }
@@ -56,8 +58,8 @@ impl FloatTextureTrait for FloatScaledTexture {
 
 #[derive(Clone, Debug)]
 pub struct SpectrumScaledTexture {
-    tex: Arc<SpectrumTexture>,
-    scale: Arc<FloatTexture>,
+    pub tex: Arc<SpectrumTexture>,
+    pub scale: Arc<FloatTexture>,
 }
 
 impl SpectrumTextureTrait for SpectrumScaledTexture {
diff --git a/src/utils/math.rs b/src/utils/math.rs
index 9c562c5..449b2eb 100644
--- a/src/utils/math.rs
+++ b/src/utils/math.rs
@@ -1,6 +1,6 @@
 use half::f16;
 use shared::Float;
-use shared::utils::Ptr;
+use shared::utils::DevicePtr;
 use shared::utils::math::{DigitPermutation, PRIMES};
 
 pub fn new_digit_permutation(base: u32, seed: u64) -> Vec<u16> {
@@ -56,7 +56,7 @@ pub fn compute_radical_inverse_permutations(seed: u64) -> (Vec<u16>, Vec<DigitPe
             views.push(DigitPermutation::new(
                 base as u32,
                 n_digits,
-                Ptr(ptr_to_data),
+                DevicePtr(ptr_to_data),
             ));
         }
 
diff --git a/src/utils/mod.rs b/src/utils/mod.rs
index 22d32ee..65d51dd 100644
--- a/src/utils/mod.rs
+++ b/src/utils/mod.rs
@@ -1,3 +1,4 @@
+pub mod arena;
 pub mod containers;
 pub mod error;
 pub mod file;
@@ -9,6 +10,7 @@ pub mod parameters;
 pub mod parser;
 pub mod sampling;
 
+pub use arena::{Arena, Upload};
 pub use error::FileLoc;
 pub use file::{read_float_file, resolve_filename};
 pub use parameters::{
diff --git a/src/utils/sampling.rs b/src/utils/sampling.rs
index 9cde366..b0e55b8 100644
--- a/src/utils/sampling.rs
+++ b/src/utils/sampling.rs
@@ -1,30 +1,39 @@
 use shared::Float;
 use shared::core::geometry::{Bounds2f, Point2f};
-use shared::utils::Ptr;
+use shared::utils::DevicePtr;
 use shared::utils::sampling::{
-    AliasTable, PiecewiseConstant1D, PiecewiseConstant2D, PiecewiseLinear2D,
+    AliasTable, DevicePiecewiseConstant1D, DevicePiecewiseConstant2D, PiecewiseLinear2D,
 };
 use std::sync::Arc;
 
 #[derive(Debug, Clone)]
-pub struct PiecewiseConstant1DHost {
-    pub view: PiecewiseConstant1D,
-    _func: Vec<Float>,
-    _cdf: Vec<Float>,
+pub struct PiecewiseConstant1D {
+    pub func: Vec<Float>,
+    pub cdf: Vec<Float>,
+    pub func_integral: Float,
+    pub min: Float,
+    pub max: Float,
 }
 
-impl std::ops::Deref for PiecewiseConstant1DHost {
-    type Target = PiecewiseConstant1D;
-    fn deref(&self) -> &Self::Target {
-        &self.view
-    }
-}
-
-impl PiecewiseConstant1DHost {
+impl PiecewiseConstant1D {
     pub fn new(f: &[Float]) -> Self {
         Self::new_with_bounds(f, 0.0, 1.0)
     }
 
+    pub fn to_shared(&self, arena: &mut Arena) -> DevicePiecewiseConstant1D {
+        let func_ptr = arena.alloc_slice(&self.func);
+        let cdf_ptr = arena.alloc_slice(&self.cdf);
+
+        DevicePiecewiseConstant1D {
+            func: func_ptr,
+            cdf: cdf_ptr,
+            func_integral: self.func_integral,
+            n: func.len(),
+            min: self.min,
+            max: self.max,
+        }
+    }
+
     pub fn new_with_bounds(f: &[Float], min: Float, max: Float) -> Self {
         let n = f.len();
 
@@ -47,44 +56,31 @@ impl PiecewiseConstant1DHost {
             }
         }
 
-        let view = PiecewiseConstant1D {
-            func: Ptr(func_vec.as_ptr()),
-            cdf: Ptr(cdf_vec.as_ptr()),
+        Self {
+            func: func_vec,
+            cdf: cdf_vec,
+            func_integral,
             min,
             max,
-            n: n as u32,
-            func_integral,
-        };
-
-        Self {
-            view,
-            _func: func_vec,
-            _cdf: cdf_vec,
         }
     }
 }
 
 #[derive(Debug, Clone)]
-pub struct PiecewiseConstant2DHost {
-    pub view: PiecewiseConstant2D,
-    _p_conditional_v: Vec<PiecewiseConstant1D>,
+pub struct PiecewiseConstant2D {
+    pub domain: Bounds2f,
+    pub p_marginal: PiecewiseConstant1D,
+    pub p_conditionals: Vec<PiecewiseConstant1D>,
 }
 
-impl std::ops::Deref for PiecewiseConstant2DHost {
-    type Target = PiecewiseConstant2D;
-    fn deref(&self) -> &Self::Target {
-        &self.view
-    }
-}
-
-impl PiecewiseConstant2DHost {
+impl PiecewiseConstant2D {
     pub fn new(data: &Array2D<Float>, x_size: u32, y_size: u32, domain: Bounds2f) -> Self {
         let nu = x_size as usize;
         let nv = y_size as usize;
         let mut conditionals = Vec::with_capacity(nv);
         for v in 0..nv {
             let row = unsafe { core::slice::from_raw_parts(data.values.add(v * nu), nu) };
-            conditionals.push(PiecewiseConstant1D::new_with_bounds(
+            conditionals.push(DevicePiecewiseConstant1D::new_with_bounds(
                 row,
                 domain.p_min.x(),
                 domain.p_max.x(),
@@ -92,24 +88,16 @@ impl PiecewiseConstant2DHost {
         }
 
         let marginal_funcs: Vec<Float> = conditionals.iter().map(|c| c.func_integral).collect();
-        let p_marginal = PiecewiseConstant1D::new_with_bounds(
+        let p_marginal = DevicePiecewiseConstant1D::new_with_bounds(
             &marginal_funcs,
             domain.p_min.y(),
             domain.p_max.y(),
         );
 
-        let p_conditional_v = conditionals.as_mut_ptr();
-        std::mem::forget(conditionals);
-        let view = PiecewiseConstant2D {
+        Self {
             domain,
             p_marginal,
-            n_conditionals: nv,
-            p_conditional_v: Ptr(p_conditional_v),
-        };
-
-        Self {
-            view,
-            _p_conditional_v: p_conditional_v,
+            p_conditionals: conditionals,
         }
     }