Medium EffectsAnimated
Spinning rays with a dark vignette
A picture built in steps: spin, then draw rays, 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 448 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: Spin
turn p by time * 0.5 radians: c = cos(angle), s = sin(angle), p = float2(c * p.x + s * p.y, -s * p.x + c * p.y)- Step 2: Pattern
m = step(0.5, frac(atan2(p.y, p.x) / 6.2831853 * 24.0))- Step 3: Colors
lerp(float3(0.17, 0.84, 0.71), float3(0.69, 0.13, 0.51), m)- Step 4: Finish
col *= 1.0 - 0.5 * smoothstep(0.2, 0.85, 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