ShaderBattle

Hard NatureAnimated

Drifting clouds

Blue sky, white fbm clouds drifting to the right.

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The target picture for the shader challenge "Drifting clouds"
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 813 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

Cloud space
float2(uv.x * aspect, uv.y) * 3.0 + float2(time * 0.15, 0.0)
Cloud amount
smoothstep(0.45, 0.85, fbm(...))
Sky
lerp(float3(0.55,0.78,1.0), float3(0.2,0.45,0.85), uv.y)
Cloud color
white

Helper functions provided

The toolbox has: hash(), vnoise(), fbm(). 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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