Medium Effects
Bulging checkerboard with a border
A picture built in steps: bulge, then draw checkerboard, then color it, then finish with a border. 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 436 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: Bulge
p *= 1.0 + 0.8 * dot(p, p)- Step 2: Pattern
m = abs(fmod(floor(p.x * 8.0) + floor(p.y * 8.0), 2.0))- Step 3: Colors
lerp(float3(0.07, 0.15, 0.05), lerp(float3(0.52, 0.91, 0.21), float3(0.35, 0.48, 0.92), uv.y), m)- Step 4: Finish
edge = min(min(uv.x, 1.0 - uv.x), min(uv.y, 1.0 - uv.y)); col = lerp(float3(0.93, 0.7, 0.51), col, smoothstep(0.04, 0.046, edge))
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