A bird chirps from a tree in a dense forest during daylight, surrounded by foliage and open outdoor space; each short call returns with repeated cave-like echoes, as if the bird were inside a vast stone cavern.
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 bird
- a forest
Event: a bird chirps from a tree in a dense daylight forest
Audio presence
- a bird
Sound: bird chirps
Key standards
Visual physical commonsense (V-PC)
- A bird is visible in a tree within a dense daylight forest with foliage and open outdoor space surrounding it, and visibly opens its beak to chirp.
- The environment remains a dense outdoor forest throughout the clip with no stone cave or large enclosed cavern visible at any point.
Audio physical commonsense (A-PC)
- Each chirp has the bright high-frequency tonal character of a real bird call.
- Each chirp is followed by repeated cave-like echoes with the long delayed reflections and dense reverberant decay of a vast stone cavern.
Cross-modal physical commonsense (AV-PC)
- Each chirp onset aligns in time with the bird's visible beak motion, and the cave-like echoes follow in the audio after each chirp.