# BFS Head V1.1: Qwen Image 2.1 In-Context Face & Head Swap (Surgical Skin-Detail Ablation)

> Canonical URL: https://decomfy.com/bfs-head-swap-v1-1-qwen-image-2-1/
> Architecture: Qwen Image 2.1 (DiT)
> Hardware Verification: RTX 4070 (Minimum 10GB VRAM, Recommended 12GB VRAM)

## Overview
Open-source head-swapping architecture powered by Qwen Image 2.1 DiT and Alissonerdx's BFS V1.1 LoRA. Features surgical img_mlp.gate_up weight ablation to eliminate plastic skin softening while preserving 100% 3D head pose and complex ambient lighting integration.

## Generation Parameters
- **Resolution**: 832x1248
- **Sampler**: euler
- **Scheduler**: simple
- **Steps**: 12
- **CFG Scale**: 2.5
- **Seed**: 85244748616565

## Positive Prompt
```text
head_swap: start with <image1> as the base image, keeping its lighting, environment, and background. remove the head from <image1> completely and replace it with the head from <image2>, but maintain the aspect ratio of the head from <image1>, maintain the direction of the eye, head rotation, skin color, micro expressions from <image1>. high quality, sharp details, 4k
```

## Negative Prompt
```text
None
```

## LoRA Adapters
- `bfs_head_v1.1_qwen_2.1.safetensors` (weight: 1)

## Required Model Files
- **models/loras**: `undefined` (undefined)
- **models/loras**: `undefined` (undefined)
- **models/diffusion_models**: `undefined` (undefined)
- **models/text_encoders**: `undefined` (undefined)
- **models/vae**: `undefined` (undefined)

## 1-Click Terminal Synchronization
Run inside your ComfyUI root directory:
```bash
curl -fsSL https://decomfy.com/api/scripts/bfs-head-swap-v1-1-qwen-image-2-1.sh | bash
```

Windows PowerShell:
```powershell
irm https://decomfy.com/api/scripts/bfs-head-swap-v1-1-qwen-image-2-1.ps1 | iex
```

## Programmatic API Endpoints
- Raw Workflow JSON: https://decomfy.com/api/workflows/bfs-head-swap-v1-1-qwen-image-2-1.json
- Bash Setup Script: https://decomfy.com/api/scripts/bfs-head-swap-v1-1-qwen-image-2-1.sh
- PowerShell Script: https://decomfy.com/api/scripts/bfs-head-swap-v1-1-qwen-image-2-1.ps1
- LLM Markdown: https://decomfy.com/api/markdown/bfs-head-swap-v1-1-qwen-image-2-1.md