← all videos

A person claps inside a grand cathedral and the clap rings on for several seconds. Then the same person claps in a small closet, and the sound is tight and dry.

C3-2-01 Environment Transition · enclosure_geometry principle: Reverberation (Wave)
Seedance 2.0ByteDance · proprietary
Kling 3.0 OmniKuaishou · proprietary
Veo 3.1Google · proprietary
LTX-2.3Lightricks · open
Ovi 1.1character.ai · open
JavisDiT++JavisDiT · open
MagiHumanGAIR-NLP · open
Per-prompt rubric

Basic standards

Visual presence

  • a person
  • a cathedral
  • a closet

Event: a person claps in a cathedral and in a closet

Audio presence

  • a person

Sound: a hand clap

Key standards

Visual physical commonsense (V-PC)

  • A single person performs a single hand clap inside a cathedral.
  • The same person performs a single hand clap inside a small closet or wardrobe.

Audio physical commonsense (A-PC)

  • The cathedral clap carries a long spacious reverberation tail lasting several seconds.
  • The closet clap is tight and dry with rapid decay and no spacious reverberation.

Cross-modal physical commonsense (AV-PC)

  • Each clap sound aligns in time with its corresponding visible hand-clap action.
  • The reverberation character of each clap matches the visible space in which the clap occurs.