Open-Sourcing BodyRec: Comparing Character Body Proportions
FugueSegue · reddit · 2026-07-14
The author open-sourced a tool called BodyRec to fingerprint and compare the "body proportions" of character LoRAs.
Core approach:
- Takes full-body renders of a batch of characters as input to extract two types of features: skeleton lengths and SMPL shape coefficients
- Provides separate skeleton / build similarity scores instead of mixing them into a single value
- Supports offline retrieval, allowing the entire library to be sorted by body similarity given a specific character
The author also shared two implementation findings:
- Bodies generated by the same LoRA with different seeds vary significantly, so fingerprints use the median of about 12 images to stabilize results
- Cropped or incomplete pose images distort shape estimation, hence clean full-body images are required
The project is MIT-licensed, but the underlying NLF / GVHMR models are subject to research-only non-commercial licenses. The author emphasizes this is merely a critiqueable demo, not a formal product.
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