# GPT Image Hub prompt

## FACS Expression Control for Character Portraits
- URL: https://www.gptimagehub.com/library/facs-expression-control-for-character-portraits
- Generator URL: https://www.gptimagehub.com/generate?promptId=oss-ym-g2-19275
- Markdown URL: https://www.gptimagehub.com/api/agent/markdown?path=%2Flibrary%2Ffacs-expression-control-for-character-portraits
- Category: Character Design
- Model: gpt-image-2
- Aspect ratio: 1:1
- Style: photorealistic
- Tags: facs, facial expression, character design, portrait, face control, reference sheet
- Updated: 2026-10-27T22:00:33.098Z
- Created: 2026-10-27T22:00:33.098Z

Modify a reference character's expression with precision using FACS action unit codes. Swap the bracketed FACS code and description to alter emotions while preserving facial identity.

### Full prompt
```text
Facial expression modification of the female character in the reference photo. Apply Facial Action Coding System (FACS) unit: [AU46 - Wink]. Keep the subject's identity, facial structure, hairstyle, skin tone, clothing, camera angle, and neutral studio lighting completely consistent with the reference photo, changing only the specified facial muscle activation.
```