FLUX.2 Klein 9B Image Inpainting

Flux.2 Klein 9B + LanPaint gives you high‑quality, mask‑based inpainting on Klein without needing a special “inpaint” checkpoint, using a dedicated LanPaint sampler instead of the default KSampler.​

What LanPaint is (for Klein)

• LanPaint is a training‑free inpainting/outpainting sampler that plugs into ComfyUI and can work with “any” diffusion model, including Flux.2 Klein.

• In practice you swap your normal sampler (KSampler/Flux sampler) for a LanPaint KSampler and keep the rest of the inpaint graph (VAE Encode for Inpainting, Set Latent Noise Mask / Crop & Stitch, etc.).​

Key features relevant to Flux Klein

• High‑quality masked edits: Designed specifically around the classic Set Latent Noise Mask masking flow, so it’s ideal for Klein’s masked editing/inpainting workflows.​

• Model‑agnostic: Works as a universal inpaint/outpaint tool for modern base models, “especially useful” when the base model (like Klein) doesn’t ship a separate inpaint finetune.

• Extra “thinking” steps: LanPaint adds iterative refinement during denoising (more internal reasoning steps) to improve structure and detail in the masked region.

• Supports Z‑image inpainting and integrations (e.g., with Qwen Image Edit) to help with Klein’s common issues like image shifting.​​

Typical use cases with Flux.2 Klein 9B

• Local semantic edits: Change clothing, accessories, small objects, or facial details in a Klein‑generated or real photo using a mask and text prompt.​

• Object removal/cleanup: Remove logos, wires, distracting elements and have Klein fill the region cleanly with LanPaint doing the inpaint.​​

• Segment‑based “surgical” edits: Combine SAM/segment masks + LanPaint + Klein for accurate edits to only one region (e.g., “only the shirt”, “only the background”).​​

• Multi‑reference masked edits: Use Klein’s multi‑reference editing plus LanPaint to, for example, replace a shirt with clothing from another image inside a painted mask.​​

High‑level ComfyUI wiring (conceptual)

• Use a normal Flux.2 Klein 9B load + VAE (or XL VAE as recommended) and an inpaint‑style prep: VAE Encode (for Inpainting) + Set Latent Noise Mask or Crop & Stitch.​

• Feed the masked latent into LanPaint KSampler (instead of KSampler) with your text prompt and conditioning wired exactly as you would for Flux Klein, then decode back with VAE Decode.