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A slow-motion shot of rain hitting a window with droplets streaking across the glass and steady drumming on the pane. A clean studio voice narrates, "Rain falls the same way every time."

C1-2-19 Steady State · source_anchoring principle: Non-Diegetic Sound (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

  • rain
  • a window

Event: rain hits a window in slow motion

Audio presence

  • rain
  • a narrator

Sound: ['rain drumming on a window', 'a narration voice']

Key standards

Visual physical commonsense (V-PC)

  • A window with vertical glass is visibly present in the scene.
  • Rain droplets behave physically as droplets streaking down the vertical glass surface.

Audio physical commonsense (A-PC)

  • The narration voice is clean and dry with studio-recording quality and no room reverberation.

Cross-modal physical commonsense (AV-PC)

  • The narration voice plays as a non-diegetic overlay, with no visible character shown speaking the line.