Medium EffectsAnimated
Pulsing cross with a border
A picture built in steps: zoom in and out, then draw cross, 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 489 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: Zoom in and out
p *= 1.0 + 0.4 * sin(time * 2.5)- Step 2: Pattern
d = min(max(abs(p.x) - 0.22 * 0.3, abs(p.y) - 0.22), max(abs(p.x) - 0.22, abs(p.y) - 0.22 * 0.3)); m = 1.0 - smoothstep(0.0, 0.006, d)- Step 3: Colors
lerp(float3(0.25, 0.21, 0.75), float3(0.45, 0.72, 0.2), m)- Step 4: Finish
edge = min(min(uv.x, 1.0 - uv.x), min(uv.y, 1.0 - uv.y)); col = lerp(float3(0.62, 0.16, 0.88), 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