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PAI-Actor: Cinematic Multi-Character Replacement in Dynamic Scenes

arXiv · AI, language, vision and robotics · article · Sep 5, 2026 · UTC

We present PAI-Actor, a cinematic multi-character animation framework for character replacement in dynamic movie scenes. Unlike conventional animation systems that mainly drive a single static image or a single subject, our goal is to replace and animate multiple characters within real video clips while preserving the original scene dynamics, camera motion, and background content. This setting is particularly challenging because the generated characters must remain consistent with the source performance in motion and interaction, while also matching the surrounding background in lighting, shad

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