ShaderBattle

Easy Filters

Chromatic aberration

Split the red and blue channels outward from the center like a cheap lens.

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The target picture for the shader challenge "Chromatic aberration"
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 748 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

Offset
dir = (uv - 0.5) * 0.02
Red
scene(uv + dir).r
Green
scene(uv).g
Blue
scene(uv - dir).b

Helper functions provided

The toolbox has: scene(). Add them above your frag function with one click.

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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