PhiloLabs releases Fable 5.1 AI-generated 3D world of SF's Union Square
Original: Fable 5.1 World Modeling
Why This Matters
Demonstrates autonomous AI agents capable of end-to-end 3D world generation from open geospatial data at production quality.
PhiloLabs has open-sourced fable51-worlds on GitHub, a browser-native 3D reconstruction of San Francisco's Union Square built entirely by autonomous Claude Fable 5.1 agent swarms. The project uses Three.js, open data, and public imagery — no game engine required.
PhiloLabs has released fable51-worlds, an open-source repository on GitHub that generates explorable, browser-native 3D reconstructions of real-world locations using autonomous AI agent swarms powered by Claude Fable 5.1. The first published world is Union Square, San Francisco, covering Powell, Geary, Post, and Stockton Streets on a real terrain and street grid. The scene includes 453 OSM building footprints, 75 hand-authored façades, 129 named storefronts, 220 pedestrians navigating a 1,398-node graph, and 109 vehicles including Powell Street cable cars. Two explorable interiors are included: Apple Union Square (300 Post St) and Nintendo San Francisco (331 Powell St), with 23 interactive objects. Quality was validated against 34 camera-matched viewpoints and 147 comparison sheets. The project ships as a plain Three.js app — no proprietary 3D tiles or game engine — and can be launched locally with 'npm run dev'. A 59-second walkthrough video at 1920×1080 is publicly available. The repo has 176 stars and 7 forks as of publication.