Endless Procedural City Runs in Browser via WebGPU, All Code Written by Opus 5.5

Promptmethus · x · 2026-10-09

Developer Ryan Sael showcased an endlessly procedural city running in the browser with WebGPU: no 3D artists, no game engine, no downloads. From a single seed, towers, cars, and lights are all generated on the fly as the city grows infinitely.

According to the author, 100% of the code was written by Opus 5.5, making it a striking demo of both procedural generation and fully AI-authored codebases.

Related event: Dev builds infinite procedural city in browser entirely with Claude Opus 5.5(3 posts)→

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