Claude Code built a toy-town sim of Fürth where every train runs on real timetable and sensor data
Greedy-Giraffe-4269 · reddit · 2026-11-12
A Redditor used Claude Code to build a 3D toy-town world (N-gauge model railway look) based on the real city of Fürth, Germany, with an engine written from scratch in Swift and Metal — no game engine.
- Everything moving is driven by one day of real recorded data (Sat 10 Oct 2026): every train, S-Bahn, U-Bahn, tram and bus at real times, including ICE 501 at 250 km/h through the 7.6 km Euerwang tunnel; river levels, wind-speed-driven turbines, car-park occupancy, the real sun, and 2.55 million catalogued stars
- Buildings sit on real footprints with real heights
- The film is one continuous 22,680-frame camera flight rendered on two Macs; the music was also made by Claude
- Main limit is disk space; the author is exploring open-sourcing the project
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