BFS-Best-Face-Swap

🧬 BFS — Best Face Swap (Qwen Image Edit, Flux 2 Klein, Krea 2)

The BFS (Best Face Swap) LoRA series was created for Qwen Image Edit 2509/2511, Flux 2 Klein 4b/9b, and Krea 2, designed to perform high-fidelity face, head, and full-person swaps with natural tone blending and consistent lighting.

Each version focuses on a different level of replacement, from subtle face swaps to full head transfers.
Use each LoRA with its matching base model and workflow. Krea 2 head/body workflows are included in the workflows folder.

👉 Workflows for all BFS versions can be downloaded here:
Head/Face Swap Workflow — Qwen Image Edit 2509 (Civitai)

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🔹 Versions Overview

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🧠 BFS Head V5 details (2511)

This release includes multiple variants:

• 100% original: direct result of training for 5,500+ steps on model 2511
• Merged versions: a merge of BFS Head V4 (2509) into the 2511-trained original

In my evaluation, the merged version performs better, especially at reproducing a wider range of expressions.
It is not perfect yet, but it indicates we are moving in the right direction.

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🧪 Krea 2 Head and Body Swap

BFS Head Swap V1.1

This is the updated Krea 2 head swap release and replaces bfs_head_swap_v1_krea2.safetensors.

Trigger prompt:

head_swap: replace the head with the reference head.

Workflow: workflows/Head Swap Krea 2 - V1 Simple Workflow.json

BFS Body Swap V1 (Experimental)

This is an experimental version. The pose will not always be copied exactly from the original image.

Trigger prompt:

body_swap: replace the person with the reference person.

To also change the background, append this below the trigger prompt:

BG: [describe the new background]

You can combine the body swap LoRA with the Krea 2 head swap LoRA to improve head identity. As a starting point, use both LoRAs at 0.5 strength, then adjust based on your own tests.

Workflow: workflows/Body Swap Krea 2 - V1 Simple Workflow.json

Feel free to experiment and post your results.

Body Swap examples

<p align="center"> <img src="images/bfs_body_swap_v1_krea2_example_yoga.png" width="49%" /> <img src="images/bfs_body_swap_v1_krea2_example_seated.png" width="49%" /> <img src="images/bfs_body_swap_v1_krea2_example_restaurant.png" width="49%" /> <img src="images/bfs_body_swap_v1_krea2_example_kitchen.png" width="49%" /> <img src="images/bfs_body_swap_v1_krea2_example_closeup.png" width="49%" /> <img src="images/bfs_body_swap_v1_krea2_example_outdoors.png" width="49%" /> </p>

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🖼️ Input Structure (Control Images)

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💬 Prompts

🧠 BFS Face V1

Base prompt:

face swap face from Image 1 to Image 2.

Alternative:

face swap face from Image 1 to Image 2. swap only the face (not the hair), match the skin tone to Image 2, keep Image 2 pose and lighting.

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🧩 BFS Head V1 – 2509 (Likely works with 2511)

Base prompt:

head swap from Image 1 to Image 2

Alternatives:

head swap from Image 1 to Image 2 with perfect skin match
Head swap from Image 1 to Image 2, keep all facial details and hair from Image 1, blend naturally with Image 2’s body.
head swap face from Image 1 to Image 2, keep all facial details and hair from Image 1, blend naturally with Image 2’s body, remove all hair of Image 2 and replace by hair from Image 1 and keep the same expression and head proportion as in Image 2

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🧬 BFS Head V2 – 2509 (Likely works with 2511)

head swap, transfer head from Image 1 to Image 2

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⚡ BFS Head V3 – 2509 (Recommended) (Likely works with 2511)

head_swap: start with Picture 1 as the base image, keeping its lighting, environment, and background. remove the head from Picture 1 completely and replace it with the head from Picture 2. ensure the head and body have correct anatomical proportions, and blend the skin tones, shadows, and lighting naturally so the final result appears as one coherent, realistic person.

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⚡ BFS Head V4 – 2509 (Likely works with 2511)

h34d_sw4p: replace the head of Picture 1 by the head from Picture 2, strictly preserving the identity, facial features (eyes, nose, mouth), and skin texture of Picture 2. ensure the new head mimics the identical expression, angle, and rotation found in Picture 1.

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⚡ BFS Head V5 – 2511 (Recommended)

head_swap: start with Picture 1 as the base image, keeping its lighting, environment, and background. remove the head from Picture 1 completely and replace it with the head from Picture 2, strictly preserving the hair, eye color, and nose structure of Picture 2. copy the eye direction, head rotation, and micro-expressions from Picture 1. high quality, sharp details, 4k

⚡ BFS Head V1/V2 – Flux 2 Klein 4b/9b (Recommended)

head_swap: start with Picture 1 as the base image, keeping its lighting, environment, and background. remove the head from Picture 1 completely and replace it with the head from Picture 2, strictly preserving the hair, eye color, nose structure of Picture 2. copy the direction of the eye, head rotation, micro expressions from Picture 1, high quality, sharp details, 4k.

[Optional]Describe the expression in Picture 1 and copy it to the new image.

[Optional][You can describe the facial expression or other details here.]

<p align="center"> <img src="images/ComfyUI_04745_.png" width="100%" /> <img src="images/ComfyUI_04755_.png" width="100%" /> <img src="images/ComfyUI_04759_.png" width="100%" /> <img src="images/ComfyUI_04761_.png" width="100%" /> </p>

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🧾 Notes

• Works best with Qwen Image Edit 2509 base model (and some versions also perform well on 2511).
• Control image order:
  • Face V1 / Head V1 / Head V2 → Image 1 = Face, Image 2 = Body
  • Head V3 / Head V4 / Head V5 → Image 1 = Body, Image 2 = Face (inverted order)
• For improved alignment, you may optionally use pose or face mesh controls.
• Krea 2 Body Swap V1 is experimental; exact pose transfer is not guaranteed.
• Please do not use or share results involving public figures or individuals who have not given consent.

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☕ Support

If this project helped you, consider supporting my work:
https://buymeacoffee.com/nrdx

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