Krea 2 head swap in ComfyUI by Stable Yogi

Two photos in. The clothes, the pose, the background and the light all stay. Only the head changes and it changes properly, hair and all, instead of averaging the two people together.

That averaging is the point of this post. It is what the recipes going round give you by default: blonde hair that still has the first woman's curl in it, and a face that is neither of them. Two things decide it.

One LoRA, not two.

There is a head-swap LoRA and it is tempting to stack it on the identity one. Six versions on the same seed and the same two photos: every version with two LoRAs blended the two people, at every ref_boost. Every version with the identity LoRA alone swapped cleanly. It is not a strength you can tune your way out of — it is the wrong stack.

The instruction has to say REMOVE.

"Put the head from photo two onto the woman in photo one" never tells the model to get rid of the first head, so it averages them. Three lists, not one: hold the base, remove the old head completely, then name what travels with the new one — the hair, its colour, its length, the way it falls, the eye colour, the nose, the jaw.

Two more worth knowing. The model list going round for this names the wrong VAE — Krea 2 ships exactly one and it is not the Wan one; use the wrong file and it finishes with no error and saves coloured static. And a source photo that is not a clean 16:9 leaves a thin smeared band along the bottom. That band is arithmetic, not the model.

The workflow is free, the checkpoint is my own and also free, and the walkthrough video shows every node in order.

Workflow, model download links and the full write-up: https://forgebun.com/go/civit_headswap_wf

The checkpoint: https://forgebun.com/go/civit_muse_krea2

Credit where it is due: the identity-edit LoRA is conradlocke's and the node pack is lbouaraba's. The checkpoint, the workflow, the settings and the write-up are mine.