How do you prompt AI video models to generate realistic walking and physical action scenes?

Realistic walking and physical action comes from describing the motion in specific physical language — pace, weight, body mechanics — stating camera movement separately from subject action, layering scene-tailored positive and negative constraints, and giving the model the full clip duration to complete the movement. Documented productions average 3 generations per usable shot, so plan for iteration.

Describe the motion physically, not atmospherically. "Make it cinematic" or "a woman walks through a market" gives the model nothing to animate. Specify pace, weight, and mechanics: "walks at a measured pace, weight shifting on uneven cobblestones, vendors moving in the background." AI video is a garbage-in, garbage-out discipline — vague prompts produce vague motion — and the model executes exactly what you narrate, so narrate the physicality as elaborately as the emotion you want.

State subject motion and camera motion as separate instructions. Every motion prompt needs three explicit pieces: camera movement, subject action, and overall mood — merging them into one clause invites the model to muddle them. Write the subject's action first, then the camera move in its own sentence. For chaotic action, specifying the camera handling style — "war zone documentary style" — produces shaky, kinetic footage that reads as realistic action without requiring perfect shot coherence. Keep camera moves deliberate: because Seedance 2.0 generates frame by frame, whip pans and fast angle changes can drop character identity mid-shot.

Bake in spatial logic and scene-tailored constraints. Spell out spatial rules explicitly — a character on screen-left stays screen-left unless they visibly walk — or you get glitch artifacts. Then layer positive constraints (feet making ground contact, natural arm swing) and negative constraints (no floating, no cloning, no anatomical errors), tailored to each specific scene rather than pasted universally. Apply negatives sparingly: over-using them backfires, and the model sometimes does exactly what it was told not to do.

Give the motion room to complete. For walking or motion-heavy shots in Seedance 2.0, allocate the full 15-second clip duration even if any dialogue is short — rushed durations produce rushed, unnatural movement. If the motion comes back slightly too slow, speed it up in post; generated motion speed doesn't have to be final.

Skip timestamps and second-by-second acting cues. Scripting the action beat-by-beat produces robotic, stilted performance, and timestamped dialogue makes Seedance 2.0 hallucinate filler lines to pad dead time. Give the action, the line, and the scene context, and let the model set its own pacing.

Use references for choreography you can't articulate, and budget iterations. invideo is an agentic video creation tool with all the current video models available, and its reference inputs go beyond stills: one production screen-recorded a fight sequence from a reference film, uploaded it to the invideo agent, and had the choreography analyzed and reinterpreted without describing a single move. (Acting a shot out on your phone and uploading the footage as reference works the same way for camera setups prompting can't reach.) Expect multi-character physical contact — bodies, ropes, props touching — to break models fastest: one documented episode averaged 3 generations per usable shot, and 17 of its final shots — over 40% — were Frankenstein shots stitched from the best seconds of two or more generations.

Route the shot to the right model. Seedance 2.0 generates 15-second motion clips with native audio and holds stylized movement cleanly; Kling 3.0 generates multi-shot sequences natively and is cited by some AI filmmakers as the preference for slow-motion action; Veo covers general cinematic coverage. All of these models run inside invideo, and the invideo agent writes the full technical motion prompt from your plain-language direction and routes each shot to the model that suits it.

Watch some of these to see what works for you:

Every time you have motion action, you don't want that rushed. So I'm going to give him that 15 seconds so that C Dance 2.0 will have room.

— an AI filmmaker documenting a Seedance 2.0 production workflow