Easy Patterns
Ring with a dark vignette
A picture built in steps: draw ring, 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 360 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: Pattern
d = abs(length(p) - 0.19) - 0.19 * 0.18; m = 1.0 - smoothstep(0.0, 0.006, d)- Step 2: Colors
lerp(float3(0.96, 0.94, 0.95), float3(0.81, 0.28, 0.59), m)- Step 3: Finish
col *= 1.0 - 0.75 * smoothstep(0.35, 0.95, 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