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| "## Flux BG Inpaint (Flux.1 Fill / OneReward)\n\n**True masked inpainting of the background with FLUX.1 Fill dev (fp8), person auto-masked by [SAM3](https://github.com/1038lab/ComfyUI-RMBG)** (needs [ComfyUI-RMBG](https://github.com/1038lab/ComfyUI-RMBG) + [ComfyUI-KJNodes](https://github.com/kijai/ComfyUI-KJNodes))\n\n- **Note**: Fill cannot see the masked-out background, so it invents a NEW scene behind the person (guided only by the prompt and the subject). For \"same scene but sharper\" use `qwen-bg-enhance` / `qwen-bg-inpaint-true` / `flux2-bg-inpaint` instead - this workflow is for full background replacement.\n- **Model**: pick in *Load Flux Fill Model*: `flux1-fill-dev-fp8` (official Fill weights) or `flux1-fill-dev-onereward-fp8` (ByteDance OneReward variant, tuned for context-aware inpaint). CLIP + VAE come from the `flux1-dev-fp8` checkpoint - its MODEL output is unused.\n- **Sampling**: FluxGuidance `30` (Fill's recommended range), 24 steps euler/normal, CFG 1, denoise 1.0, DifferentialDiffusion for softer mask blending.\n- **Background mask**: person mask shrunk 4px + 8px feather, inverted - regen bites slightly into the subject edge so no halo survives. Fill preserves the subject natively; the final composite pastes the original person back on top as a guarantee (keep mask `expand 6 / blur 12`).\n- Output is resized back to the exact input resolution before the composite.\n- Via API: `--set 3.image=file.png`, `--set 1.unet_name=flux1-fill-dev-onereward-fp8.safetensors`, `--set 7.text='...'`.\n\n**Models** (all in [aleph65/ComfyUI](https://huggingface.co/aleph65/ComfyUI)): `flux1-fill-dev-fp8`, `flux1-fill-dev-onereward-fp8`, `flux1-dev-fp8` (checkpoint, for CLIP+VAE), `sam3.pt`\n" |
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