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A street musician plays an accordion on a sidewalk. A listener walks slowly away and the music grows steadily quieter with each step.

C2-3-03 Event Transition · source_radiation principle: Inverse square law (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 street musician
  • an accordion
  • a listener
  • a sidewalk

Event: a musician plays an accordion while a listener walks on a sidewalk

Audio presence

  • an accordion

Sound: accordion music

Key standards

Visual physical commonsense (V-PC)

  • The accordion player continues playing the accordion while a listener visibly walks farther away along the sidewalk during the clip.

Audio physical commonsense (A-PC)

  • Accordion music is heard throughout the segment in which the player is visibly performing, and that music grows steadily quieter as the clip progresses.

Cross-modal physical commonsense (AV-PC)

  • The decrease in accordion loudness corresponds to the visibly increasing distance between the listener and the player.