One line per person with only what never changes: build, hair, face features, clothing, plus where they are from and how their voice sounds, repeated word for word in every prompt.

Cast block

Each person keeps their face, build and clothes across every shot of a job.

Use when: Any video with recurring people.

Prompt instructions

Scene: [your subject] in [your setting]. Cast: [your subject]; one line per person with only what never changes: build, hair, face features, clothing, plus where they are from and how their voice sounds, repeated word for word in every prompt Shot 1 (0:00 to 0:05): one continuous shot

Seedance 2.5 reads labelled blocks with timecodes.

SubjectSetting

Watch out

Only invariants in the cast block; what changes per shot goes in the shot.practitioner: Rourke Heath (8 Aug 2026) via Director Chair field notes on video prompting
A fixed character in video needs the start frame and the character sheet in every job; the start frame shows only one angle.measured: House rule

One identity document that every later still and video binds, so the character stays the same.

Full-body character sheetPrompt

The same voice in every generation of the film.

Voice linePrompt

Several generations look like one film because each was told it is the same film.

The look blockPrompt