Flux Fill inpainting & outpainting

Inpaint or outpaint with flux1-fill-dev; mask via MaskEditor in the Load Image node.

Estimated VRAM

~23.8 GB — ⚠️ ESTIMATE (unverified real-world usage). Estimate, not a measured figure: weight-size floor = flux1-fill-dev.safetensors (23.8 GB, sizes verified on Hugging Face/GitHub). Activations add more; ComfyUI offloading can reduce it. Source, checked 2026-10-13.

Models required

• flux1-fill-dev.safetensors — 23.805 GB ✅ verified 2026-10-13 (listing) → models/diffusion_models

Tested GPUs

No verified test reports yet.

Nodes

UNETLoader LoadImage InpaintModelConditioning KSampler VAEDecode

Common errors & fixes

Mask has no effect

Right-click the image in Load Image → Open in MaskEditor and paint the mask (source). ✅ per source

Low-VRAM tips

⚠️ General guidance, not individually verified.

• fp8 weight_dtype

Source & credit

Workflow by comfyanonymous (ComfyUI_examples). Get it from the original: https://comfyanonymous.github.io/ComfyUI_examples/flux/. License: FLUX.1 [dev] Non-Commercial License.