ShaderBattle

Medium EffectsAnimated

Spinning scrolling stripes

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

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The target picture for the shader challenge "Spinning scrolling stripes"
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 366 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 * -0.7 radians: c = cos(angle), s = sin(angle), p = float2(c * p.x + s * p.y, -s * p.x + c * p.y)
Step 2: Scroll
p.y += time * 0.4
Step 3: Pattern
m = step(0.3, frac(dot(p, float2(1.0, 1.0)) * 12.0))
Step 4: Colors
lerp(float3(0.9, 0.92, 0.95), float3(0.15, 0.33, 0.8), 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

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