Direct answer
An AI avatar model sheet should capture the avatar’s stable identity markers, allowed variation, visual references, voice/tone notes, rights assumptions and rejection criteria. Its job is to make future generations easier to judge, not merely easier to prompt.
Why this matters
Prompt libraries are not enough. A model sheet gives designers, editors and clients a shared artefact for consistency, approval and drift detection across still images, video and campaign use.
How to use it
- Identity: name, role, age range, personality function.
- Visual constants: face shape, hair, proportions, colour palette, key details.
- Allowed variation: wardrobe, setting, camera angle, mood.
- Forbidden variation: features that must not change.
- Production notes: tools, prompts, seed/reference method and review criteria.
Example
| Field | Example |
|---|---|
| Role | Editorial guide character |
| Constants | Short black hair, round glasses, warm neutral palette |
| May vary | Desk setting, hand pose, light direction |
| Must not vary | Face shape, age, glasses, skin tone range |
| Reject if | Looks younger, different ethnicity, inconsistent facial structure |
Caveats and limits
Do not treat the model sheet as final legal clearance. It is an identity-control document, not a rights audit.