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Easy Filters

Pixelated grid

A picture built in steps: pixelate, then draw grid, then color it. Every step is listed below with its exact numbers.

Play this challenge All challenges

The target picture for the shader challenge "Pixelated grid" — Recreate this picture. You pass at a 99% match, then try to write it in fewer characters than the par.

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 279 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: Pixelate: p = (floor(p * 16.0) + 0.5) / 16.0 (snap the position to a grid of 16 blocks per unit)
Step 2: Pattern: e = abs(frac(p * 7.0) - 0.5); m = step(0.44, max(e.x, e.y)) (lines on the cell borders)
Step 3: Colors: lerp(float3(0.15, 0.21, 0.1), float3(0.41, 0.86, 0.38), 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.