All groups

The reaction arrives half a beat after the line, the smile starts small and grows, the people in the background react at different moments.

Expressions

Reactions arrive late

Timing that feels live: people react like people, not like a chorus.

Use when: Dialogue, group scenes, creator content.

Prompt instructions

Scene: [your subject] in [your setting]. Shot 1 (0:00 to 0:05): the reaction arrives half a beat after the line, the smile starts small and grows, the people in the background react at different moments

Seedance 2.5 reads labelled blocks with timecodes.

SubjectSetting

Watch out

Extras who react in sync are a strong AI tell. Give the background people their own small actions.vendor: Higgsfield's tested UGC prompt via Director Chair field notes on video prompting

Both people in a dialogue feel alive.

The listener acts tooPrompt

Acting that reads as real instead of a generated face pulling an expression.Emotion as behaviourPrompt

Sources

Rules from Director Chair field notes on video prompting Checked 2026-10-13.

For agents: this card as markdown, as JSON.