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A ball drops onto a thick gymnastics mat, producing a soft dead thud. It barely bounces.

C1-1-24 Steady State · source_material principle: Soft material sounds (Material)
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 ball
  • a gymnastics mat

Event: a ball drops onto a mat

Audio presence

  • a ball
  • a gymnastics mat

Sound: ball-on-mat impact

Key standards

Visual physical commonsense (V-PC)

  • The ball lands on the gymnastics mat, follows a smooth gravitational trajectory through the clip, and comes to rest with at most one small rebound.

Audio physical commonsense (A-PC)

  • The landing is a soft dead thud with rapid decay and a mat-absorbed character.

Cross-modal physical commonsense (AV-PC)

  • The thud onset aligns in time with the visible moment the ball contacts the mat.