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From an empty folder to a small game you can play, test and build: connect Opus 5.5 to the Unity Editor, pass six gates from greybox level to models and sound, and prove it runs with Unity's Play mode verification loop and PlayMode tests.
A 16-day AI pipeline turned The Little Prince into an explorable 3D game: Image 2.5 art, Tripo assets, Opus 5.5 driving Blender and Unity, Astra iterating. ~3M views; prompts published.
The run book behind PaperRoute: mechanics before art, engine and look as separate threads, Blender driven by headless Python, Meshy for faces, review renders driving iteration, 39 tracked hours.
A practical recipe for foot sliding: solve the leg with soft-clamped two-bone IK and toe orientation, lock the toe target during contacts with inertialization, annotate contacts automatically, then use a position-based dynamics-style offline pass to distribute corrections. The key insight is velocity preservation, not sticking to the ground, and the toe—not the heel—is what should be locked.
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