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A person sits in a downstairs room. Footsteps from upstairs come through the ceiling clearly and sharply, each step distinct.

C1-3-15 Steady State · sound_persistence principle: Solid as Medium (Fluid)
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 downstairs room
  • a ceiling

Event: a person sits in a downstairs room

Audio presence

  • footsteps

Sound: footsteps through a ceiling

Key standards

Visual physical commonsense (V-PC)

  • A downstairs room with a visible ceiling and a seated person is rendered.

Audio physical commonsense (A-PC)

  • The audible events have the cadence and timbre of distinct footsteps.

Cross-modal physical commonsense (AV-PC)

  • The footsteps appear to originate from above the ceiling rather than from within the visible downstairs room.