Fable-5.1 Rewrites TrackMania Physics Engine in Pure C in a Day

A developer showed Fable-5.1 rewriting the TrackMania Nations Forever physics engine in pure C within about a day, running roughly 2400% faster than the original single-core, and trained a PPO agent on it.

2026-09-02 ~ 2026-09-02 · 2 related posts

• Fable-5.1 rewrites TrackMania physics engine in pure C in a day, trains its own PPO policy — adonis_singh · 2026-09-02
• Fable-5.1 rewrites Trackmania physics engine in pure C, ~2400x/core faster — adonis_singh · 2026-09-02