Skip to the content

Easy 2DAnimated

Spinning flower

A six-petal flower that slowly turns, with a yellow center.

Play this challenge All challenges

The target picture for the shader challenge "Spinning flower" — 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 401 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

Petal edge: R = 0.2 + 0.08 * cos(6.0 * (angle + time * 0.5))
Flower: float3(0.95, 0.45, 0.65)
Background: float3(0.1, 0.3, 0.15)
Center: float3(1.0, 0.85, 0.2), radius 0.05
Edges: smoothstep(R - 0.01, R, r)

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.