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A basketball bounces on the hardwood inside a closed gymnasium with a long bright reverb. The scene cuts to an outdoor court, where a basketball bounces with a flat dull sound.

C3-2-09 Environment Transition · enclosure_geometry principle: Open vs Enclosed (Wave)
Seedance 2.0ByteDance · proprietary
Kling 3.0 OmniKuaishou · proprietary
Veo 3.1Google · proprietary
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Ovi 1.1character.ai · open
JavisDiT++JavisDiT · open
MagiHumanGAIR-NLP · open
Per-prompt rubric

Basic standards

Visual presence

  • a basketball
  • a gymnasium
  • an outdoor court

Event: a basketball bounces on a court

Audio presence

  • a basketball

Sound: basketball bounce

Key standards

Visual physical commonsense (V-PC)

  • A basketball bounces inside an indoor gymnasium with a hardwood floor.
  • A basketball bounces on an outdoor concrete or asphalt court.

Audio physical commonsense (A-PC)

  • The gym bounce carries a long bright reverberation tail.
  • The outdoor bounce is flat and dull with quick decay.

Cross-modal physical commonsense (AV-PC)

  • Each bounce sound aligns in time with the visible ball contact in its respective location.
  • The reverberation character of each bounce matches the visible court in which it occurs.