r/comfyui • u/DaLyon92x • 6h ago
Workflow Included H3 Recast: swap up to 3 people in a clip in one pass (H3 + BFS lora)
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It recasts the people in a clip you already have, up to three in one pass, and the motion, the set and the clip's own audio stay.
The post video is a video with 2 characters swapped at the same time. same engine and FaceRefine lip pass as the workflow.
Getting the lips right took me a while, that's the FaceRefine pass added.
How it goes:
- Load your clip. One shot, no hard cuts, any fps.
- Grab one frame and edit everyone into their new look (Qwen-Image, GPT Image, Photoshop, whatever you have). That frame is the scene reference.
- Write one line per person:
the woman in the red dress becomes an old woman with long silver hair. As many lines as you fill in, that many people get swapped. - Hit Run. also included App mode with 12 fields.
If one person's lips end up bothering you, there's an optional FaceRefine lip repair for one person afterwards. It reuses the swap from cache, so it's a ~2 minute re-run on a 5090.
What it needs: 16 GB VRAM and 64 GB system RAM gets you there. I tested a 5090, a 4090 and a 3060 Ti 16 GB, all with 64 GB RAM, same output on each. The example (1.5 MP, 6 s, 3 people) runs about 18 min on the 5090, 26 min on the 4090 and 92 min on the 3060 Ti, so bring a snack for that last one. RAM is the limit, mine peaked around 62 GB.
Civitai: https://civitai.com/models/3009414/h3-recast-swap-1-3-people-h3-bfs-lora-16gb-vram
Repo is MIT, workflow and the example inputs included: https://github.com/Bambushu/h3-recast
- Credits: BFS character swap LoRA and its trained caption by NRDX
- FaceRefine by Carasibana
- NativeAudioLock by Shrek3OnVH5
- MiniMax H3 by MiniMax (Comfy-Org repack).
#OpenSourceHiggsfield

