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Easy PatternsAnimated

Scrolling grid

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

Play this challenge All challenges

The target picture for the shader challenge "Scrolling grid" — 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 301 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.y += time * 0.1
Step 2: Pattern: e = abs(frac(p * 7.0) - 0.5); m = step(0.46, max(e.x, e.y)) (lines on the cell borders)
Step 3: Colors: lerp(float3(0.07, 0.17, 0.08), lerp(float3(0.35, 0.92, 0.33), float3(0.54, 0.36, 0.93), uv.y), 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.