diff --git a/shared/src/materials/dielectric.rs b/shared/src/materials/dielectric.rs
index e89eacb..d2f12be 100644
--- a/shared/src/materials/dielectric.rs
+++ b/shared/src/materials/dielectric.rs
@@ -96,13 +96,13 @@ impl MaterialTrait for ThinDielectricMaterial {
         ctx: &MaterialEvalContext,
         lambda: &mut SampledWavelengths,
     ) -> BSDF {
-        let sampled_eta = self.eta.evaluate(lambda[0]);
+        let mut sampled_eta = self.eta.evaluate(lambda[0]);
         if !self.eta.is_constant() {
             lambda.terminate_secondary_inplace();
         }
 
         if sampled_eta == 0. {
-            sampled_eta == 1.;
+            sampled_eta = 1.;
         }
 
         let bxdf = BxDF::ThinDielectric(ThinDielectricBxDF::new(sampled_eta));
diff --git a/shared/src/textures/checkerboard.rs b/shared/src/textures/checkerboard.rs
index ea4ee3d..2e09e4d 100644
--- a/shared/src/textures/checkerboard.rs
+++ b/shared/src/textures/checkerboard.rs
@@ -7,14 +7,17 @@ use crate::spectra::{SampledSpectrum, SampledWavelengths};
 use crate::utils::{Ptr, math::square};
 use num_traits::Float as NumFloat;
 
-fn checkerboard(
-    ctx: &TextureEvalContext,
-    map2d: Ptr<TextureMapping2D>,
-    map3d: Ptr<TextureMapping3D>,
-) -> Float {
+#[repr(C)]
+#[derive(Debug, Copy, Clone)]
+pub enum CheckerMap {
+    D2(TextureMapping2D),
+    D3(TextureMapping3D),
+}
+
+fn checkerboard(ctx: &TextureEvalContext, checker_map: CheckerMap) -> Float {
     let d = |x: Float| -> Float {
         let y = x / 2. - (x / 2.).floor() - 0.5;
-        return x / 2. + y * (1. - 2. * y.abs());
+        x / 2. + y * (1. - 2. * y.abs())
     };
 
     let bf = |x: Float, r: Float| -> Float {
@@ -24,48 +27,52 @@ fn checkerboard(
         (d(x + r) - 2. * d(x) + d(x - r)) / square(r)
     };
 
-    if !map2d.is_null() {
-        assert!(map3d.is_null());
-        let c = map2d.map(&ctx);
-        let ds = 1.5 * c.dsdx.abs().max(c.dsdy.abs());
-        let dt = 1.5 * c.dtdx.abs().max(c.dtdy.abs());
-        // Integrate product of 2D checkerboard function and triangle filter
-        0.5 - bf(c.st[0], ds) * bf(c.st[1], dt) / 2.
-    } else {
-        assert!(!map3d.is_null());
-        let c = map3d.map(&ctx);
-        let dx = 1.5 * c.dpdx.x().abs().max(c.dpdy.x().abs());
-        let dy = 1.5 * c.dpdx.y().abs().max(c.dpdy.y().abs());
-        let dz = 1.5 * c.dpdx.z().abs().max(c.dpdy.z().abs());
-        0.5 - bf(c.p.x(), dx) * bf(c.p.y(), dy) * bf(c.p.z(), dz)
+    match checker_map {
+        CheckerMap::D2(map) => {
+            let c = map.map(ctx);
+            let ds = 1.5 * c.dsdx.abs().max(c.dsdy.abs());
+            let dt = 1.5 * c.dtdx.abs().max(c.dtdy.abs());
+            // Integrate product of 2D checkerboard function and triangle filter
+            0.5 - bf(c.st[0], ds) * bf(c.st[1], dt) / 2.
+        }
+        CheckerMap::D3(map) => {
+            let c = map.map(ctx);
+            let dx = 1.5 * c.dpdx.x().abs().max(c.dpdy.x().abs());
+            let dy = 1.5 * c.dpdx.y().abs().max(c.dpdy.y().abs());
+            let dz = 1.5 * c.dpdx.z().abs().max(c.dpdy.z().abs());
+            0.5 - bf(c.p.x(), dx) * bf(c.p.y(), dy) * bf(c.p.z(), dz)
+        }
     }
 }
 
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]
 pub struct FloatCheckerboardTexture {
-    pub map2d: Ptr<TextureMapping2D>,
-    pub map3d: Ptr<TextureMapping3D>,
+    pub map: CheckerMap,
     pub tex: [Ptr<FloatTexture>; 2],
 }
 
 impl FloatCheckerboardTexture {
+    pub fn new(map: CheckerMap, tex: [Ptr<FloatTexture>; 2]) -> Self {
+        Self { map, tex }
+    }
+
     pub fn evaluate(&self, ctx: &TextureEvalContext) -> Float {
-        let w = checkerboard(&ctx, self.map2d, self.map3d);
+        let w = checkerboard(ctx, self.map);
 
         let mut t0 = 0.0;
         let mut t1 = 0.0;
 
-        if w != 1.0 {
-            if let Some(tex) = self.tex[0].get() {
-                t0 = tex.evaluate(ctx);
-            }
+        if w != 1.0
+            && let Some(tex) = self.tex[0].get()
+        {
+            t0 = tex.evaluate(ctx);
         }
 
-        if w != 0.0 {
-            if let Some(tex) = self.tex[1].get() {
-                t1 = tex.evaluate(ctx);
-            }
+        if w != 0.0
+            && let Some(tex) = self.tex[1].get()
+        {
+            t1 = tex.evaluate(ctx);
         }
 
         (1.0 - w) * t0 + w * t1
@@ -75,30 +82,33 @@ impl FloatCheckerboardTexture {
 #[repr(C)]
 #[derive(Clone, Copy, Debug)]
 pub struct SpectrumCheckerboardTexture {
-    pub map2d: Ptr<TextureMapping2D>,
-    pub map3d: Ptr<TextureMapping3D>,
+    pub map: CheckerMap,
     pub tex: [Ptr<SpectrumTexture>; 2],
 }
 
 impl SpectrumCheckerboardTexture {
+    pub fn new(map: CheckerMap, tex: [Ptr<SpectrumTexture>; 2]) -> Self {
+        Self { map, tex }
+    }
+
     pub fn evaluate(
         &self,
         ctx: &TextureEvalContext,
         lambda: &SampledWavelengths,
     ) -> SampledSpectrum {
-        let w = checkerboard(ctx, self.map2d, self.map3d);
+        let w = checkerboard(ctx, self.map);
         let mut t0 = SampledSpectrum::new(0.);
         let mut t1 = SampledSpectrum::new(0.);
-        if w != 1.0 {
-            if let Some(tex) = self.tex[0].get() {
-                t0 = tex.evaluate(ctx, lambda);
-            }
+        if w != 1.0
+            && let Some(tex) = self.tex[0].get()
+        {
+            t0 = tex.evaluate(ctx, lambda);
         }
 
-        if w != 0.0 {
-            if let Some(tex) = self.tex[1].get() {
-                t1 = tex.evaluate(ctx, lambda);
-            }
+        if w != 0.0
+            && let Some(tex) = self.tex[1].get()
+        {
+            t1 = tex.evaluate(ctx, lambda);
         }
 
         t0 * (1.0 - w) + t1 * w
diff --git a/shared/src/textures/dots.rs b/shared/src/textures/dots.rs
index 84191da..f10e728 100644
--- a/shared/src/textures/dots.rs
+++ b/shared/src/textures/dots.rs
@@ -1,8 +1,6 @@
 use crate::Float;
 use crate::core::geometry::{Point2f, VectorLike};
-use crate::core::texture::{
-    FloatTexture, SpectrumTexture, TextureEvalContext, TextureMapping2D,
-};
+use crate::core::texture::{FloatTexture, SpectrumTexture, TextureEvalContext, TextureMapping2D};
 use crate::spectra::sampled::{SampledSpectrum, SampledWavelengths};
 use crate::utils::Ptr;
 use crate::utils::math::square;
@@ -22,18 +20,30 @@ fn inside_polka_dot(st: Point2f) -> bool {
             return true;
         }
     }
-    return false;
+    false
 }
 
 #[repr(C)]
 #[derive(Debug, Clone, Copy)]
 pub struct FloatDotsTexture {
     pub mapping: TextureMapping2D,
-    pub outside_dot: Ptr<FloatTexture>,
     pub inside_dot: Ptr<FloatTexture>,
+    pub outside_dot: Ptr<FloatTexture>,
 }
 
 impl FloatDotsTexture {
+    pub fn new(
+        mapping: TextureMapping2D,
+        inside_dot: Ptr<FloatTexture>,
+        outside_dot: Ptr<FloatTexture>,
+    ) -> Self {
+        Self {
+            mapping,
+            inside_dot,
+            outside_dot,
+        }
+    }
+
     pub fn evaluate(&self, ctx: &TextureEvalContext) -> Float {
         let c = self.mapping.map(ctx);
         let target_texture = if inside_polka_dot(c.st) {
@@ -54,11 +64,22 @@ impl FloatDotsTexture {
 #[derive(Clone, Copy, Debug)]
 pub struct SpectrumDotsTexture {
     pub mapping: TextureMapping2D,
-    pub outside_dot: Ptr<SpectrumTexture>,
     pub inside_dot: Ptr<SpectrumTexture>,
+    pub outside_dot: Ptr<SpectrumTexture>,
 }
 
 impl SpectrumDotsTexture {
+    pub fn new(
+        mapping: TextureMapping2D,
+        inside_dot: Ptr<SpectrumTexture>,
+        outside_dot: Ptr<SpectrumTexture>,
+    ) -> Self {
+        Self {
+            mapping,
+            inside_dot,
+            outside_dot,
+        }
+    }
     pub fn evaluate(
         &self,
         ctx: &TextureEvalContext,
diff --git a/shared/src/textures/fbm.rs b/shared/src/textures/fbm.rs
index 06b289f..d411010 100644
--- a/shared/src/textures/fbm.rs
+++ b/shared/src/textures/fbm.rs
@@ -5,11 +5,18 @@ use crate::utils::noise::fbm;
 #[derive(Debug, Clone, Copy)]
 pub struct FBmTexture {
     pub mapping: TextureMapping3D,
-    pub omega: Float,
     pub octaves: u32,
+    pub omega: Float,
 }
 
 impl FBmTexture {
+    pub fn new(mapping: TextureMapping3D, octaves: u32, omega: Float) -> Self {
+        Self {
+            mapping,
+            omega,
+            octaves,
+        }
+    }
     pub fn evaluate(&self, ctx: &TextureEvalContext) -> Float {
         let c = self.mapping.map(ctx);
         fbm(c.p, c.dpdx, c.dpdy, self.omega, self.octaves)
diff --git a/src/textures/bilerp.rs b/src/textures/bilerp.rs
index 965e0c6..2ca81b3 100644
--- a/src/textures/bilerp.rs
+++ b/src/textures/bilerp.rs
@@ -30,7 +30,6 @@ impl CreateFloatTexture for FloatBilerpTexture {
     }
 }
 
-
 impl CreateSpectrumTexture for SpectrumBilerpTexture {
     fn create(
         render_from_texture: Transform,
@@ -43,9 +42,7 @@ impl CreateSpectrumTexture for SpectrumBilerpTexture {
         let zero = Spectrum::Constant(ConstantSpectrum::new(0.));
         let one = Spectrum::Constant(ConstantSpectrum::new(1.));
 
-        // `Spectrum` is already a device type, so it is allocated into the arena
-        // rather than uploaded -- upload is for host trees (Arc) -> device (Ptr).
-        let mut get = |name: &str, def: Spectrum| {
+        let get = |name: &str, def: Spectrum| {
             let s = parameters
                 .get_one_spectrum(name, Some(def), spectrum_type)
                 .unwrap_or(def);
diff --git a/src/textures/checkerboard.rs b/src/textures/checkerboard.rs
index 0b1dafd..c908514 100644
--- a/src/textures/checkerboard.rs
+++ b/src/textures/checkerboard.rs
@@ -1,37 +1,79 @@
 use crate::Arena;
-use anyhow::Result;
+use anyhow::{Result, bail};
 use shared::{
-    core::texture::SpectrumType,
-    textures::{FloatCheckerboardTexture, SpectrumCheckerboardTexture},
-    utils::Transform
+    core::spectrum::Spectrum,
+    core::texture::{SpectrumType, TextureMapping2D, TextureMapping3D},
+    spectra::ConstantSpectrum,
+    textures::{CheckerMap, FloatCheckerboardTexture, SpectrumCheckerboardTexture},
+    utils::Transform,
 };
 
 use crate::{
     core::texture::{
-        CreateFloatTexture, CreateSpectrumTexture, FloatTexture, SpectrumTexture },
-    utils::{FileLoc, TextureParameterDictionary}
+        CreateFloatTexture, CreateSpectrumTexture, CreateTextureMapping, FloatTexture,
+        SpectrumTexture,
+    },
+    utils::{ArenaUpload, FileLoc, TextureParameterDictionary},
 };
 
+fn checker_map(
+    render_from_texture: Transform,
+    parameters: TextureParameterDictionary,
+    loc: FileLoc,
+) -> Result<CheckerMap> {
+    match parameters.get_one_int("dimension", 2)? {
+        2 => Ok(CheckerMap::D2(TextureMapping2D::create(
+            &parameters,
+            &render_from_texture,
+            &loc,
+        )?)),
+        3 => Ok(CheckerMap::D3(TextureMapping3D::create(
+            &parameters,
+            &render_from_texture,
+            &loc,
+        )?)),
+        dim => bail!("{loc}: {dim} dimensional checkerboard texture not supported"),
+    }
+}
+
 impl CreateFloatTexture for FloatCheckerboardTexture {
     fn create(
-        _render_from_texture: Transform,
-        _parameters: TextureParameterDictionary,
-        _loc: FileLoc,
-        _arena: &Arena,
+        render_from_texture: Transform,
+        parameters: TextureParameterDictionary,
+        loc: FileLoc,
+        arena: &Arena,
     ) -> Result<FloatTexture> {
-        todo!()
+        let tex1 = arena.upload(parameters.get_float_texture("tex1", 1.)?);
+        let tex2 = arena.upload(parameters.get_float_texture("tex2", 0.)?);
+        let map = checker_map(render_from_texture, parameters, loc)?;
+        let tex = FloatCheckerboardTexture::new(map, [tex1, tex2]);
+        Ok(FloatTexture::Checkerboard(tex))
     }
 }
 
 impl CreateSpectrumTexture for SpectrumCheckerboardTexture {
     fn create(
-        _render_from_texture: Transform,
-        _parameters: TextureParameterDictionary,
-        _spectrum_type: SpectrumType,
-        _loc: FileLoc,
-        _arena: &Arena,
+        render_from_texture: Transform,
+        parameters: TextureParameterDictionary,
+        spectrum_type: SpectrumType,
+        loc: FileLoc,
+        arena: &Arena,
     ) -> Result<SpectrumTexture> {
-        todo!()
+        let zero = Spectrum::Constant(ConstantSpectrum::new(0.));
+        let one = Spectrum::Constant(ConstantSpectrum::new(1.));
+        let tex = |name: &str, def: Spectrum| {
+            arena.upload(
+                parameters
+                    .get_spectrum_texture(name, Some(def), spectrum_type)
+                    .expect("default supplied"),
+            )
+        };
+
+        let tex1 = tex("tex1", one);
+        let tex2 = tex("tex2", zero);
+
+        let map = checker_map(render_from_texture, parameters, loc)?;
+        let tex = SpectrumCheckerboardTexture::new(map, [tex1, tex2]);
+        Ok(SpectrumTexture::Checkerboard(tex))
     }
 }
-
diff --git a/src/textures/dots.rs b/src/textures/dots.rs
index 97cd160..f35f7be 100644
--- a/src/textures/dots.rs
+++ b/src/textures/dots.rs
@@ -1,36 +1,57 @@
-use crate::Arena;
+use crate::{Arena, ArenaUpload};
 use anyhow::Result;
 use shared::{
-    core::texture::SpectrumType,
+    core::spectrum::Spectrum,
+    core::texture::{SpectrumType, TextureMapping2D},
+    spectra::ConstantSpectrum,
     textures::{FloatDotsTexture, SpectrumDotsTexture},
-    utils::Transform
+    utils::Transform,
 };
 
 use crate::{
     core::texture::{
-        CreateFloatTexture, CreateSpectrumTexture, FloatTexture, SpectrumTexture },
-    utils::{FileLoc, TextureParameterDictionary}
+        CreateFloatTexture, CreateSpectrumTexture, CreateTextureMapping, FloatTexture,
+        SpectrumTexture,
+    },
+    utils::{FileLoc, TextureParameterDictionary},
 };
 
 impl CreateFloatTexture for FloatDotsTexture {
     fn create(
-        _render_from_texture: Transform,
-        _parameters: TextureParameterDictionary,
-        _loc: FileLoc,
-        _arena: &Arena,
+        render_from_texture: Transform,
+        parameters: TextureParameterDictionary,
+        loc: FileLoc,
+        arena: &Arena,
     ) -> Result<FloatTexture> {
-        todo!()
+        let map = TextureMapping2D::create(&parameters, &render_from_texture, &loc)?;
+        let inside = parameters.get_float_texture("inside", 1.)?;
+        let outside = parameters.get_float_texture("outside", 1.)?;
+
+        let tex = FloatDotsTexture::new(map, arena.upload(inside), arena.upload(outside));
+
+        Ok(FloatTexture::Dots(tex))
     }
 }
 
 impl CreateSpectrumTexture for SpectrumDotsTexture {
     fn create(
-        _render_from_texture: Transform,
-        _parameters: TextureParameterDictionary,
-        _spectrum_type: SpectrumType,
-        _loc: FileLoc,
-        _arena: &Arena,
+        render_from_texture: Transform,
+        parameters: TextureParameterDictionary,
+        spectrum_type: SpectrumType,
+        loc: FileLoc,
+        arena: &Arena,
     ) -> Result<SpectrumTexture> {
-        todo!()
+        let map = TextureMapping2D::create(&parameters, &render_from_texture, &loc)?;
+        let zero = Spectrum::Constant(ConstantSpectrum::new(0.));
+        let one = Spectrum::Constant(ConstantSpectrum::new(1.));
+
+        let get = |name: &str, def: Spectrum| {
+            let t = parameters
+                .get_spectrum_texture(name, Some(def), spectrum_type)
+                .expect("default supplied");
+            arena.upload(t)
+        };
+        let tex = SpectrumDotsTexture::new(map, get("inside", one), get("outside", zero));
+        Ok(SpectrumTexture::Dots(tex))
     }
 }
diff --git a/src/textures/fbm.rs b/src/textures/fbm.rs
index 2508c4a..54eaf65 100644
--- a/src/textures/fbm.rs
+++ b/src/textures/fbm.rs
@@ -1,21 +1,26 @@
 use crate::Arena;
 use anyhow::Result;
-use shared::core::texture::TextureEvalContext;
+use shared::core::texture::{TextureEvalContext, TextureMapping3D};
 use shared::{textures::FBmTexture, utils::Transform};
 
 use crate::{
-    core::texture::{CreateFloatTexture, FloatTexture },
-    utils::{FileLoc, TextureParameterDictionary}
+    core::texture::{CreateFloatTexture, CreateTextureMapping, FloatTexture},
+    utils::{FileLoc, TextureParameterDictionary},
 };
 
 impl CreateFloatTexture for FBmTexture {
     fn create(
-        _render_from_texture: Transform,
-        _parameters: TextureParameterDictionary,
-        _loc: FileLoc,
-        _arena: &Arena,
+        render_from_texture: Transform,
+        parameters: TextureParameterDictionary,
+        loc: FileLoc,
+        arena: &Arena,
     ) -> Result<FloatTexture> {
-        todo!()
+        let map = TextureMapping3D::create(&parameters, &render_from_texture, &loc)?;
+        let tex = FBmTexture::new(
+            map,
+            parameters.get_one_int("octaves", 5)?.try_into().unwrap(),
+            parameters.get_one_float("roughness", 0.5)?,
+        );
+        Ok(FloatTexture::FBm(tex))
     }
 }
-