Medium EffectsAnimated

Rippling spiral with a pulsing brightness

A picture built in steps: ripple the space, then draw spiral, then color it, then finish with a pulsing brightness. Every step is listed below with its exact numbers.

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The target picture for the shader challenge "Rippling spiral with a pulsing brightness" — 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 339 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: Ripple the space: p.x += 0.07 * sin(p.y * 6.0 + time * 2.5)
Step 2: Pattern: m = smoothstep(-0.2, 0.2, sin(7.0 * atan2(p.y, p.x) + 2.5 * length(p) * 6.28318))
Step 3: Colors: lerp(float3(0.12, 0.14, 0.06), float3(0.6, 0.85, 0.29), m)
Step 4: Finish: col *= 0.85 + 0.15 * sin(time * 2.5)

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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