Hard Effects
Twisted triangle with scanlines
A picture built in steps: twist, then draw triangle, then color it, then finish with scanlines. 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 524 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: Twist
angle = 2.5 * (1.0 - smoothstep(0.0, 0.5, length(p))); turn p by that angle- Step 2: Pattern
d = max(abs(p.x) * 0.866 + p.y * 0.5, -p.y) - 0.28 * 0.5; m = 1.0 - smoothstep(0.0, 0.006, d)- Step 3: Colors
lerp(float3(0.09, 0.21, 0.2), lerp(float3(0.4, 0.8, 0.84), float3(0.83, 0.36, 0.67), uv.y), m)- Step 4: Finish
col *= 0.8 + 0.2 * step(0.5, frac(uv.y * 100.0))
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