Medium Effects

Rippling grid with a fade to dark at the bottom

A picture built in steps: ripple the space, then draw grid, then color it, then finish with a fade to dark at the bottom. Every step is listed below with its exact numbers.

The target picture for the shader challenge "Rippling grid with a fade to dark at the bottom"
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 297 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: Ripple the space
p.x += 0.1 * sin(p.y * 6.0)
Step 2: Pattern
e = abs(frac(p * 5.0) - 0.5); m = step(0.43, max(e.x, e.y)) (lines on the cell borders)
Step 3: Colors
lerp(float3(0.1, 0.12, 0.06), float3(0.59, 0.92, 0.18), m)
Step 4: Finish
col *= 0.6 + 0.4 * uv.y

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