Open-source .char file locks face, body and clothing consistency in Flux and Minimax H3

ashishsanu · reddit · 2026-09-27

The author open-sourced OmniChar (GPLv3): a portable .char file that packs one character's face, body and clothing references to keep identity consistent across Flux 2 Klein 9b stills and Minimax H3 video.

How it works:

Building a .char: up to 9 references, ideally a 2:2:1 face:clothing:body ratio; YuNet finds faces, SFace takes per-reference face signatures, DINOv2 takes a subject signature, then everything is cleaned and packed into one file (face-only required)
At generation, the .char feeds references into Flux's native multi-reference channel and prepends a locked description to the prompt

Prompting notes:

Name your character and just say "sia walking on the beach"; don't re-describe features in the generation prompt
Only add specific overrides (e.g. half sleeves) there; clothing/body references can interfere and cause drift
Use cropped, single-subject references; conflicting faces across references cause generation conflicts

Requirements: 24GB+ VRAM Nvidia GPU and 64GB RAM locally; Minimax H3 now has an int8 variant. Workflows and GitHub repo linked in the post.

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Open-source .char file locks face, body and clothing consistency in Flux and Minimax H3

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