In Proceedings of Pacific Graphics Conference Papers, Posters, and Demos
Iterative Lightmap Updates for Scene Editing
Lightmaps are popular for precomputed global illumination, but require costly recomputation when the scene changes. We present the theory and an iterative algorithm to update lightmaps efficiently, when objects are inserted or removed. Our method is based on path tracing, but focuses on updates to those paths that are affected by the scene change. Using an importance sampling scheme, our solution substantially accelerates convergence. Our GPU implementation is well-suited for interactive scene editing scenarios.
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Citation
Guowei Lu, Christoph Peters, Petr Kellnhofer, and Elmar Eisemann,
Iterative Lightmap Updates for Scene Editing,
In Proceedings of Pacific Graphics Conference Papers, Posters, and Demos, 2025.
BibTex
@inproceedings{bib:lu:2025,
author = { Lu, Guowei and Peters, Christoph and Kellnhofer, Petr and Eisemann, Elmar },
title = { Iterative Lightmap Updates for Scene Editing },
booktitle = { In Proceedings of Pacific Graphics Conference Papers, Posters, and Demos },
editors = { Christie, Marc and Han, Ping-Hsuan and Lin, Shih-Syun and Pietroni, Nico and Schneider, Teseo and Tsai, Hsin-Ruey and Wang, Yu-Shuen and Zhang, Eugene },
year = { 2025 },
publisher = { The Eurographics Association },
doi = { 10.2312/pg.20251293 },
url = { https://publications.graphics.tudelft.nl/papers/827 },
}