Medium Effects
Pinched grid with a dark vignette
A picture built in steps: pinch, then draw grid, then color it, then finish with a dark vignette. 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 408 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 + -0.52 * dot(p, p)- Step 2: Pattern
e = abs(frac(p * 10.0) - 0.5); m = step(0.44, max(e.x, e.y)) (lines on the cell borders)- Step 3: Colors
lerp(float3(0.1, 0.09, 0.22), lerp(float3(0.47, 0.42, 0.88), float3(0.9, 0.72, 0.5), uv.y), m)- Step 4: Finish
col *= 1.0 - 0.55 * smoothstep(0.3, 0.8, length(s)), s = (uv - 0.5) * float2(aspect, 1.0)
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