Easy PatternsAnimated

Scrolling ring outline

A picture built in steps: scroll, then draw ring outline, then color it. Every step is listed below with its exact numbers.

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The target picture for the shader challenge "Scrolling ring outline" — Recreate this picture. You pass at a 99% match, then try to write it in fewer characters than the par.

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 285 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: Scroll: p.x += time * 0.3
Step 2: Pattern: d = abs(length(p) - 0.32) - 0.32 * 0.18; m = 1.0 - smoothstep(0.012, 0.02, abs(d))
Step 3: Colors: lerp(float3(0.13, 0.16, 0.06), float3(0.58, 0.87, 0.33), 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

How this challenge works

The numbers you need

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