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higgsfield-soul

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Creates and manages reusable character profiles (Soul IDs) for consistent facial and stylistic identity across multiple image and video generations. Provides identity-vs-motion prompt separation, character sheet creation workflows, micro-expression direction, and Soul Cast AI actor configuration. Use when the user wants to maintain character consistency across multiple generations, asks about Soul ID, creating reusable characters, or generating consistent people across different scenes and shots.

skills/higgsfield-soul/SKILL.md

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Nov 10, 2026

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Repository last updated
Oct 25, 2026
License
MIT

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# Higgsfield Soul ID — Character Consistency

## QUICK FACTS
*Generated-checked block (scripts/build_index.py verifies anchors). Read the linked sections for full context — these lines are routing aids, not the rules themselves.*
- Hard rule: every Soul ID prompt splits into Identity Block (static descriptors only) + Motion Block (temporal/camera only) [→](#identity-vs-motion-separation--hard-rule)
- Don't re-describe the face or core features — only describe what differs from the base character [→](#prompting-with-soul-id)
- Reference image rules: front or 3/4 angle, even lighting, neutral-to-slight expression, no blur, solo subject [→](#creating-a-strong-soul-id-reference)
- Reference generators: Soul 2.0 (fashion-forward), Nano Banana Pro (max sharpness), Seedream 4.5 (style range) [→](#creating-a-strong-soul-id-reference)
- Character sheet angles: front face, 3/4, side profile, optional full body + optional embedded prop sheets [→](#character-sheet-creation)
- Two-image floor per character: one clear face + one full body, on neutral grey — never a single image; the grey law's shade and mechanism live once in `../../templates/ad-asset-prep.md` [→](#character-sheet-creation)
- **The Untouched Base**: face pass in close-up, then a looks pass; the base close-up is never run through a model again — changes go on with masks, and a new state is a new named asset [→](#the-untouched-base--build-a-character-in-two-passes)
- **Reference plates**: biological realism ON, photographic capture behaviour OFF (no key direction, cast shadow, bokeh, flare); the background is a field, not a room; lean prompts once a reference carries identity [→](#the-reference-plate--the-two-axes)
- Prefer the single-prompt 3×2 six-panel sheet (one 16:9 generation) — identity locks better than multi-step assembly [→](#single-prompt-6-panel-character-sheet-32-grid)
- Outfit change without identity drift: split-panel sheet — ghost-mannequin outfit LEFT + "face matches input 100%" close-up RIGHT [→](#split-panel-outfit-change-sheet-ghost-mannequin--identity-panel)
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