diff --git a/src/glare.wgsl b/src/glare.wgsl
index 325445c..066db36 100644
--- a/src/glare.wgsl
+++ b/src/glare.wgsl
@@ -21,7 +21,7 @@ fn on_vertex(in: Vertex) -> Varying {
 	return Varying(uv, vec4(xy, 0., 1.));
 }
 
-const CUTOFF: i32 = 10000;
+const CUTOFF: i32 = 200;
 
 @fragment
 fn pass_h(in: Varying) -> @location(0) vec4f {
@@ -60,10 +60,16 @@ fn pass_v(in: Varying) -> @location(0) vec4f {
 // 	return .1 * w;
 // }
 
+fn weight(dist: i32) -> f32 {
+	let σ = params.sigma / 1e5;
+	let d = f32(dist) / σ;
+	return 3. / (1. + d*d);
+}
+
 // fn weight(dist: i32) -> f32 {
-// 	let σ = params.sigma / 3000.;
+// 	let σ = params.sigma / 1e8;
 // 	let d = f32(dist) / σ;
-// 	return .1 / (1. + d*d) / σ;
+// 	return 3. / (1. + abs(d));
 // }
 
 // fn weight(dist: i32) -> f32 {
@@ -72,10 +78,15 @@ fn pass_v(in: Varying) -> @location(0) vec4f {
 // 	return 1. / (1. + d*d*d) / σ;
 // }
 
-fn weight(dist: i32) -> f32 {
-	let d = f32(abs(dist));
-	let c = mix(.01, 1., exp(-d*d));
-// 	return c * pow(1.2, -d);
-	return c / (1. + pow(d, 2.0));
-// 	return .25 * c / (1. + pow(.1 * d, 4.0));
-}
+// fn weight(dist: i32) -> f32 {
+// 	let d = f32(abs(dist));
+// 	let c = mix(.01, 1., exp(-d*d));
+// // 	return c * pow(1.2, -d);
+// 	return c / (1. + pow(d, 2.0));
+// // 	return .25 * c / (1. + pow(.1 * d, 4.0));
+// }
+
+// fn weight(dist: i32) -> f32 {
+// 	let d = 2. * f32(dist);
+// 	return exp(-d*d);
+// }
diff --git a/src/present.wgsl b/src/present.wgsl
index 2a7412f..2ea9789 100644
--- a/src/present.wgsl
+++ b/src/present.wgsl
@@ -24,7 +24,7 @@ fn on_vertex(in: Vertex) -> Varying {
 
 @fragment
 fn on_fragment(in: Varying) -> @location(0) vec4f {
-	let pixel = textureSample(tex, smp, in.tex) / params.divisor;
+	let pixel = .1 * textureSample(tex, smp, in.tex) / params.divisor;
 	return vec4(rational_tone_map(pixel.xyz), 1.0);
 }
 
diff --git a/src/scene.rs b/src/scene.rs
index a35f7b1..4a77100 100644
--- a/src/scene.rs
+++ b/src/scene.rs
@@ -109,7 +109,14 @@ impl Renderer {
 		let forward = target - eye;
 		let viewport = make_viewport(size.x, size.y);
 		let location = convert_location(CamLoc { eye, forward, right });
-		let spheres: Vec<_> = scene.spheres.iter().map(|p| p.to_sphere(time)).collect();
+		let mut spheres: Vec<_> = scene.spheres.iter().map(|p| p.to_sphere(time)).collect();
+		spheres.push(crate::Sphere {
+			center: vec3(0., 215e3, 0.),
+			radius: 1e3,
+			emit_color: Vec3::splat(1.0e6),
+			reflect_color: Vec3::splat(0.),
+			glossiness: 0.,
+		});
 		let data = TracerData::new(&device, &self.tracer, &spheres);
 		self.tracer.render(
 			&mut render_pass.0,
@@ -118,7 +125,7 @@ impl Renderer {
 			trace::Params {
 				max_reflections: 3,
 				min_strength: 0.1,
-				sphere_count: N_SPHERES,
+				sphere_count: spheres.len() as u32,
 				seed,
 			},
 			viewport,
diff --git a/src/trace.wgsl b/src/trace.wgsl
index 698cb44..1872aea 100644
--- a/src/trace.wgsl
+++ b/src/trace.wgsl
@@ -96,7 +96,8 @@ fn trace_fragment(in: Varying) -> vec3f {
 		}
 		if (sphere == -1) {
 			let env = textureSampleLevel(env_texture, env_sampler, ray, 0.0);
-			result += 3.0 * color * env.xyz;
+// 			result += (vec3(5.0) + 0.001 * env.xyz) * color;
+			result += 5.0 * env.xyz * color;
 			break;
 		}
 		let s = spheres[sphere];