diff --git a/build.sc b/build.sc
index 220daa7..b347da7 100644
--- a/build.sc
+++ b/build.sc
@@ -138,11 +138,6 @@ object shaders extends mill.Module {
         makeIndigoOptions("Doughnut")
     }
 
-    object `doughnut-normal` extends shadermodule.ShaderModule {
-      val indigoOptions: IndigoOptions =
-        makeIndigoOptions("DoughnutNormal")
-    }
-
     object metaballs extends shadermodule.ShaderModule {
       val indigoOptions: IndigoOptions =
         makeIndigoOptions("Metaballs")
diff --git a/shaders/shapes/doughnut-normal/src/DoughnutNormal.scala b/shaders/shapes/doughnut-normal/src/DoughnutNormal.scala
deleted file mode 100644
index 01edb0b..0000000
--- a/shaders/shapes/doughnut-normal/src/DoughnutNormal.scala
+++ /dev/null
@@ -1,65 +0,0 @@
-import indigo.*
-
-import scala.scalajs.js.annotation.*
-import generated.*
-
-/** Make a top down view of a doughnut, where the gray value is essentially a height map of a
-  * doughtnut shape. Then turn it into a normal map.
-  */
-
-@JSExportTopLevel("IndigoGame")
-object DoughnutNormal extends IndigoShader:
-
-  val config: GameConfig =
-    Config.config.noResize
-
-  val assets: Set[AssetType]      = Assets.assets.assetSet
-  val channel0: Option[AssetPath] = None
-  val channel1: Option[AssetPath] = None
-  val channel2: Option[AssetPath] = None
-  val channel3: Option[AssetPath] = None
-
-  val shader: Shader =
-    CustomShader.shader
-
-object CustomShader:
-
-  val shader: Shader =
-    UltravioletShader.entityFragment(
-      ShaderId("shader"),
-      EntityShader.fragment[FragmentEnv](fragment, FragmentEnv.reference)
-    )
-
-  import ultraviolet.syntax.*
-
-  /*
-  GraphToy:
-  ((cos((x - 0.25) * PI * 4.0) * 0.5) + 0.5) * min(step(-0.5, x), 1.0 - step(0.5, x))
-   */
-
-  inline def fragment: Shader[FragmentEnv, Unit] =
-    Shader[FragmentEnv] { env =>
-
-      def sdCircle(p: vec2, r: Float): Float =
-        length(p) - r
-
-      def rateOfChange(d: Float, m: Float): Float =
-        val c = (cos((d - 0.25f) * env.PI * m) * 0.5f) + 0.5f
-        c * min(step(-2.0f / m, d), 1.0f - step(2.0f / m, d))
-
-      def fragment(color: vec4): vec4 =
-        val p   = env.UV - 0.5f
-        val sdf = sdCircle(p, 0.25f)
-
-        val normalised = normalize(p)
-        var d          = if sdf < 0.0f then -normalised else normalised
-        d = clamp(d, vec2(-1.0f), vec2(1.0f))
-        d = (d + 1.0f) * 0.5f
-
-        val curve = clamp(rateOfChange(sdf, 20.0f), 0.0f, 1.0f)
-
-        val normalColor = vec4(d, 1.0f, 1.0f)
-        val baseColor   = vec4(0.5f, 0.5f, 1.0f, 1.0f)
-
-        mix(baseColor, normalColor, curve)
-    }