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        "## Flux2 BG Inpaint (Klein 9B)\n\n**Masked background regeneration with FLUX.2 Klein 9B via the community noise-mask approach** - Flux.2 has no official inpaint path, so the source image is VAE-encoded, `SetLatentNoiseMask` limits denoising to the background, and `ReferenceLatent` keeps the scene grounded. (needs [ComfyUI-RMBG](https://github.com/1038lab/ComfyUI-RMBG) + [ComfyUI-KJNodes](https://github.com/kijai/ComfyUI-KJNodes))\n\n- **Sampling**: Flux2Scheduler 8 steps (Klein distilled), euler, CFGGuider cfg 1. Width/height feed from the div-16 input resize automatically. `4` steps stays truest to the original layout, `8` adds crisper texture.\n- **Prompt matters**: the default pins the lighting (\"evenly lit, no added shadows, no vignetting\") - without it Klein invents moody side-light and layered wall shadows at denoise 1.\n- **Partial denoise** (*partial denoise* node): `1.0` = full background regen (default). Drop to `0.7-0.85` to keep the original background structure/lighting and only sharpen it.\n- **Background mask**: person mask (SAM3) shrunk 4px + 8px feather, inverted. Person keep mask (`expand 6 / blur 12`) composites the original person back at the end.\n- Input is squashed to the nearest /16 dims for encoding, output resized back to the exact input resolution before the composite.\n- Via API: `--set 4.image=file.png`, `--set 10.text='...'`, `--set 14.steps=4`, `--set 24.denoise=0.8`.\n\n**Models** (all in [aleph65/ComfyUI](https://huggingface.co/aleph65/ComfyUI)): `flux-2-klein-9b`, `qwen_3_8b_fp8mixed`, `flux2-vae`, `sam3.pt`\n"
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