3DSPA as an RL reward signal measurably improves physical realism: gravity works, objects stop passing through barriers

VectorInst · x · 2026-10-08

Follow-up from Vector Institute: when 3DSPA is used as a reward signal with reinforcement learning, it measurably improves the physical realism of generative video models — gravity works properly, and objects stop passing through solid barriers.

Related event: Vector Institute's 3DSPA Measures and Improves Physical Realism in Video Models(5 posts)→

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