Hard EffectsAnimated
12-way kaleidoscope of diamond lattice, spinning
A picture built in steps: kaleidoscope, then spin, then draw diamond lattice, then color it. Every step is listed below with its exact numbers.
How this challenge works
You write a fragment shader that draws the picture above, live in your browser. A match bar shows how close you are, and the score combines accuracy, code size (the par is 514 characters in Unity (Built-in)) and GPU speed. Work in HLSL, GLSL, WGSL, Metal or Godot and export the result when you are done.
The numbers you need
- Space
p = (uv - 0.5) * float2(aspect, 1.0)- Step 1: Kaleidoscope
a = atan2(p.y, p.x); a = abs(fmod(a + 6.2831853, 0.524) - 0.262); p = length(p) * float2(cos(a), sin(a)) (12 mirrored wedges)- Step 2: Spin
turn p by time * 0.4 radians: c = cos(angle), s = sin(angle), p = float2(c * p.x + s * p.y, -s * p.x + c * p.y)- Step 3: Pattern
e = abs(frac(p * 8.0) - 0.5); m = step(0.3, e.x + e.y)- Step 4: Colors
lerp(float3(0.87, 0.93, 0.89), lerp(float3(0.27, 0.8, 0.53), float3(0.66, 0.29, 0.8), uv.y), m)
Solve it in your language
Unity (Built-in), Unity (URP), Unreal, Shadertoy / WebGL, OpenGL (LWJGL, raylib), three.js, GameMaker, LÖVE (Lua), Godot, Apple (iOS, macOS), WebGPU / Bevy.
Start coding