Parametric Shadow Control for Portrait Generation in Text-to-Image Diffusion Models

Haoming Cai1, Tsung-Wei Huang2, Shiv Gehlot2, Brandon Y. Feng3, Sachin Shah1, Guan-Ming Su2, Christopher Metzler1
1University of Maryland 2Dolby Labs, 3MIT

ICCV 2025

Paper Code Due to the copyright issue, we cannot release the code. Explanation Video (coming soon) BibTeX

Shadow Director enables parametric shadow control over strength, placement, shape, and directional lighting in generated portraits, with few hours training on single A6000.

Neural Gaffer Example

Directional Light Position - Left Light

Neural Gaffer Example

Directional Light Position - From Left to Right

Neural Gaffer Example

Shadow Strength

Neural Gaffer Example

Shadow Placement and Shape

Neural Gaffer Example

BibTeX

@inproceedings{cai2025parametric,
  title={Parametric shadow control for portrait generation in text-to-image diffusion models},
  author={Cai, Haoming and Huang, Tsung-Wei and Gehlot, Shiv and Feng, Brandon Y and Shah, Sachin and Su, Guan-Ming and Metzler, Christopher},
  booktitle={Proceedings of the IEEE/CVF International Conference on Computer Vision},
  pages={18207--18217},
  year={2025}
}