Hard EffectsAnimated
Twisted spinning checkerboard with a border
A picture built in steps: twist, then spin, then draw checkerboard, then color it, then finish with a border. 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 652 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: Twist
angle = 5.5 * (1.0 - smoothstep(0.0, 0.7, length(p))); turn p by that angle- 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
m = abs(fmod(floor(p.x * 5.0) + floor(p.y * 5.0), 2.0))- Step 4: Colors
lerp(float3(0.06, 0.19, 0.19), float3(0.4, 0.67, 0.84), m)- Step 5: Finish
edge = min(min(uv.x, 1.0 - uv.x), min(uv.y, 1.0 - uv.y)); col = lerp(float3(0.45, 0.51, 0.94), col, smoothstep(0.045, 0.051, edge))
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