Lightmap Compression with Color-Coherent UV Clustering and Cascade Texture Optimization
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Date
2026
Journal Title
Journal ISSN
Volume Title
Publisher
The Eurographics Association and John Wiley & Sons Ltd.
Abstract
To address the storage overhead of lightmaps and the limitations of existing compression techniques, we propose a novel UV-space compression framework based on per-triangle processing. By mapping triangles to a standardized domain, we cluster and repack color-coherent regions into a compact atlas, generating a cascade texture refined via differentiable rendering. Experimental results show an average storage reduction of 83% with approximately 10 dB higher PSNR than existing methods. Our approach is the first dedicated lightmap compression framework compatible with standard block-based formats, offering an effective solution for memory-efficient 3D asset delivery.
Description
CCS Concepts: Computing methodologies → Computer graphics;
@article{10.1111:cgf.70316,
journal = {Computer Graphics Forum},
title = {{Lightmap Compression with Color-Coherent UV Clustering and Cascade Texture Optimization}},
author = {Chen, Dehan and Huang, Hongyu and Luo, Yuzhe and Xu, Hao and Zhang, Yuqing and Yang, Sipeng and Gao, Xifeng and Cai, Heng and Li, Chao and Jin, Xiaogang},
year = {2026},
publisher = {The Eurographics Association and John Wiley & Sons Ltd.},
ISSN = {1467-8659},
DOI = {10.1111/cgf.70316}
}