{
 "slug": "cast-block",
 "name": "Cast block (identity lock)",
 "category": "character",
 "group": "Prompt blocks",
 "media": [
  "video"
 ],
 "checked": "2026-10-13",
 "effect": "Each person keeps their face, build and clothes across every shot of a job.",
 "use_when": "Any video with recurring people.",
 "phrase": "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",
 "pitfalls": [
  {
   "text": "Only invariants in the cast block; what changes per shot goes in the shot.",
   "evidence": "practitioner",
   "source": "Rourke Heath (8 Aug 2026) via Director Chair field notes on video prompting"
  },
  {
   "text": "A fixed character in video needs the start frame and the character sheet in every job; the start frame shows only one angle.",
   "evidence": "measured",
   "source": "House rule"
  }
 ],
 "per_model": [],
 "external_refs": [],
 "licensed": [],
 "site_names": [],
 "related": [
  "character-sheet-full-body",
  "voice-line",
  "global-look-block"
 ],
 "rights": "own-work",
 "evidence": "film-craft",
 "source": {
  "url": null,
  "note": "Own words from Director Chair field notes on video prompting"
 },
 "body": "",
 "shown_with": null,
 "url": "https://directorchair.ai/character/cast-block",
 "markdown": "https://directorchair.ai/character/cast-block.md",
 "prompts": {
  "seedance-2.5": "Scene: [your subject] in [your setting].\nCast: [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\nShot 1 (0:00 to 0:05): one continuous shot",
  "seedance-2.0": "Scene: [your subject] in [your setting].\nCast: [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\nShot 1: one continuous shot",
  "kling-3": "[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. The scene is [your setting].",
  "veo-3.1": "[your subject] in [your setting]. 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. Framing and subject stay as in the start image."
 },
 "licence": {
  "code": "MIT",
  "text": "CC BY 4.0",
  "third_party": "Clips and card texts inside a \"licensed\" block belong to their makers and are shown with permission and credit."
 }
}