Continuity is not just visual
A synthetic performer can hold the same face across shots and still fail as a character. The performance may drift, the eyeline may change, the emotional beat may reset, or the voice may imply a different person from the body.
That means continuity needs a wider record than a look book. Keep character sheet, voice status, performance references, approved expressions, prohibited uses, wardrobe rules, scene intent and disclosure requirements together.
The production question is not whether AI can make a convincing person for five seconds. It is whether the team can keep authorship, consent, continuity and audience trust intact across the whole use.
Treat every replica as licensed material
Performer organisations are drawing a clear line around digital replicas, synthetic performers and AI alteration. SAG-AFTRA's AI resources and Equity's toolkit both point toward consent, control and stronger contractual language as practical necessities.
A producer should therefore treat likeness, voice, body scan, motion reference and performance data as licensed materials with boundaries, not as generic ingredients. Record who supplied the material, what it may train or guide, where it may appear, how long it may be used and how withdrawal or expiry works.
That discipline protects the performer, but it also protects the production. A future edit, localisation pass or campaign extension should not depend on someone remembering what a prompt meant months earlier.
Create a character bible before generation
The character bible should define physical identity, voice, accent, movement, emotional range, wardrobe, lighting tolerance, age boundary, forbidden contexts and approval owner. For a human performer, it should also connect to consent records and usage limits.
For an invented AI character, the bible still matters. It prevents the model from changing the character to fit each prompt and gives producers a way to decide when a result has left the approved identity.
This is where synthetic character work becomes close to cinematography. The character is not only a face. It is how the body occupies light, lens, blocking and rhythm.
Review rights and performance together
Separate legal review from creative review, but do not let them happen in isolation. A clip that passes rights may still imply an unauthorised performance style. A clip that feels emotionally right may still exceed the consent scope.
For every selected take, mark performance pass, likeness pass, voice pass, disclosure pass and usage pass. Keep failed outputs out of client-facing decks unless their status is explicit.
The mature buyer standard is not synthetic or not synthetic. It is whether the team can show the character's continuity and rights chain from brief to final delivery.
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