Medium Effects
Pinched wavy bands
A picture built in steps: pinch, then draw wavy bands, then color it. Every step is listed below with its exact numbers.
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 299 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: Pinch
p *= 1.0 + -0.88 * dot(p, p)- Step 2: Pattern
m = 0.5 + 0.5 * sin(p.x * 10.0 + sin(p.y * 5.0) * 2.5)- Step 3: Colors
lerp(float3(0.93, 0.93, 0.87), lerp(float3(0.45, 0.86, 0.2), float3(0.78, 0.14, 0.78), 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.
Start coding