Hard Effects
6-way kaleidoscope of wave lattice, 3×3 tiled with a dark vignette
A picture built in steps: tile, then kaleidoscope, then draw wave lattice, then color it, then finish with a dark vignette. 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 491 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: Tile
p = frac(p * 3.0 + 0.5) - 0.5 (repeat the picture 3 times across)- Step 2: Kaleidoscope
a = atan2(p.y, p.x); a = abs(fmod(a + 6.2831853, 1.047) - 0.524); p = length(p) * float2(cos(a), sin(a)) (6 mirrored wedges)- Step 3: Pattern
m = smoothstep(-0.25, 0.25, sin(p.x * 11.0) * sin(p.y * 11.0))- Step 4: Colors
lerp(float3(0.85, 0.61, 0.33), float3(0.5, 0.48, 0.88), m)- Step 5: Finish
col *= 1.0 - 0.8 * smoothstep(0.25, 0.75, length(s)), s = (uv - 0.5) * float2(aspect, 1.0)
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