Fable-5.1 rewrites TrackMania physics engine in pure C in a day, trains its own PPO policy
adonis_singh · x · 2026-09-02
adonissingh shows Fable-5.1 rewriting the TrackMania Nations Forever physics engine in pure C in about a day. The video is a browser-rendered recreation using game assets, with inputs driven by a PPO policy the model trained for roughly 20 minutes—combining large-scale code rewriting with autonomous agent training.
Related event: Fable-5.1 Rewrites TrackMania Physics Engine in Pure C in a Day(2 posts)→
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