seedance-motion

seedance-motion

Use physical verbs and consequences. Motion should be observable on screen, timed within the clip, and assigned to a subject or object. Prefer one strong action with a visible endpoint over several vague actions competing for attention.

Load [ref:reference-workflow] for video-motion references, [ref:shot-list-continuity] for action handoffs across shots, [ref:examples-by-mode] for safe edit, extend, and R2V patterns, and [ref:directing-engine] when motion is performance: translate the scene's emotion into one true visible gesture per beat - a playable action with an objective and subtext - instead of an emotion word the model cannot render.

Intent

Motion is the verb of the user's story - the thing they came to see HAPPEN. The soul here is consequence: motion that begins, lands, and changes something feels lived; motion that loops feels generated. Every action carries the story one beat forward, or it doesn't belong in the clip.

Motion Contract

State: actor/object, action, force level, timing, physical consequence, continuity requirement, and endpoint.

Motion type	Strong phrase	Weak phrase
Subtle acting	Character A inhales, grips the cup tighter, then sets it down without looking away	she feels nervous
Product material	condensation beads gather, merge, and slide down the bottle neck	the product looks refreshing
Choreography	Character B ducks under the swinging bag, pivots left, and stops in a guarded stance	fast action fight scene
Object physics	paper receipt lifts in the fan breeze, flips once, and lands face-up	papers move dynamically
Environmental motion	rain streaks diagonally across the backlight while puddle ripples spread from footsteps	stormy weather atmosphere

Physics-Forward Pattern

Official material claims strong physics; extract it by writing causes and letting the model compute consequences (field-observed emphasis - test before promising results). State mass, force, and material, then name one consequence the camera can see: the heavy oak door swings shut and the candle flames bend toward it beats the door closes dramatically. Consequences prove the action: weight shows in landing compression, momentum in overshoot and recovery, friction in skid length, wind in what it displaces. One physical cause with two or three visible consequences reads stronger than three separate actions.