Download and install ComfyUI. If you are new to ComfyUI, refer to the original repository to get started. Make sure you have the latest version.
Download the pretrained model from Hugging Face and place the chord_v1.ckpt file into the ComfyUI/models/checkpoints folder.
Install the custom nodes from the ComfyUI-Manager or by cloning this repository recursively in the custom nodes folder of ComfyUI:
```
cd ./ComfyUI/custom_nodes
git clone --recursive https://github.com/ubisoft/ComfyUI-Chord.git
```

Example Workflow

You can load this workflow using the JSON file: examples/chord_example.json

License

This project is released under the Ubisoft Machine Learning License (Research-Only - Copyleft). See the full terms in the LICENSE file

Citation

If you find our work useful, please consider citing:

@misc{ying2025chord,
    title={Chord: Chain of Rendering Decomposition for PBR Material Estimation from Generated Texture Images}, 
    author={Zhi Ying and Boxiang Rong and Jingyu Wang and Maoyuan Xu},
    year={2025},
    eprint={2509.09952},
    archivePrefix={arXiv},
    primaryClass={cs.GR},
    url={https://arxiv.org/abs/2509.09952}, 
}