Part 3 of my Lab series. Checkout my other workflows on my profile, they can all be used in conjunction!

Sorry for the clutter! - subgraphs seem to break during upload

Unpacked - removed all subgraphs since they glitched sometimes. Everything displayed on 1st layer canvas

⚡ swapLab Flux 2 Klein

The Ultimate Dual-Image Characteristic Transfer Workflow for ComfyUI

Load two images. Pick what to transfer. Watch the magic happen.

SwapForge is a ComfyUI workflow that takes any two photos and seamlessly transfers faces, hair, clothes, and more from one person onto another — producing composites so clean they look like they were shot that way. No Photoshop. No manual masking. No fuss.

🚀 Why swapLab is so effective

⚡ Powered by Flux 2 Klein 9B — Fast Doesn't Mean Cheap

Forget waiting minutes for mediocre results. swapLab runs on Flux 2 Klein 9B — one of the most advanced open-source image editing models on the planet. Klein's reference-guided architecture was built for exactly this kind of task, delivering cinema-quality swaps at speeds that will make your jaw drop. Iterate faster. Create more. Wait less.

📐 Any Image. Any Size. Zero Prep.

Got images from different cameras, different aspect ratios, different resolutions? Don't touch them. swapLab's intelligent autoscaling system reads your input dimensions and automatically calibrates every part of the pipeline — latent canvas, preprocessor resolution, generation size — all of it. Just drop your images in and go.

🎯 You Stay In Control

swapLab works beautifully with zero prompt input — but when you want to get specific, the guided prompting system lets you steer the output with natural language. Want to preserve a particular detail? Emphasize something? Tweak the vibe? Just tell it. Your creative vision, turbocharged by AI.

🔒 ReActor Face Lock — Identity That Actually Sticks

Generative models drift. Faces shift. Not here. After every swap, swapLab runs a ReActor face reinforcement pass using your original source image — mathematically anchoring the final face to your reference identity. The person in the output is the person in your photo. No blending artifacts. No uncanny valley. Just a face that holds.

🎛️ Swap Modes

Mode What Transfers

👤 Face & Hair Facial features, expression, hairstyle

👗 OutfitFull clothing transfer, accessories

🧍 Full Body Complete person into new context

✨ Custom You pick — any combo of face, hair, body, clothes, accessories, background

🛠️ Under the Hood

• 🧠 Flux 2 Klein 9B — reference-guided generation engine

• 🎭 PersonMaskUltra V2 + SAM3 — surgical region detection and masking

• 📏 Intelligent Autoscaling — universal image compatibility

• 💬 Guided Prompting — natural language creative control

• 🔐 ReActor — identity-locking face reinforcement pass