Dad and Son Build a 6MB Single-File 3D Open-World Game with AI, 60 FPS on Mobile
rschu · x · 2026-10-30
Engineer rschu built the 3D open-world game 'Holy Coconut' with his foster son, starting from the kid's drawing of a coconut kicked off its planet. The whole game is a single 6MB HTML file (2MB zipped): world, models, textures, and sounds are procedurally generated at load, with WebGL real-time rendering, hundreds of shaders, particle FX, LoD, baked radiosity-style shading, day/night cycle, rigid-body physics, and cloth sim — targeting 60 FPS on a 2-year-old Android. They iterate together via prompting, testing, and refinement.
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