Lightmap Compression with Color-Coherent UV Clustering and Cascade Texture Optimization

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dc.contributor.authorChen, Dehan
dc.contributor.authorHuang, Hongyu
dc.contributor.authorLuo, Yuzhe
dc.contributor.authorXu, Hao
dc.contributor.authorZhang, Yuqing
dc.contributor.authorYang, Sipeng
dc.contributor.authorGao, Xifeng
dc.contributor.authorCai, Heng
dc.contributor.authorLi, Chao
dc.contributor.authorJin, Xiaogang
dc.contributor.editorMasia, Belen
dc.contributor.editorThies, Justus
dc.date.accessioned2026-04-17T07:47:04Z
dc.date.available2026-04-17T07:47:04Z
dc.date.issued2026
dc.description.abstractTo 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.
dc.description.number2
dc.description.sectionheadersCovering the Surface: Texture Synthesis, Patterns, and Compression
dc.description.seriesinformationComputer Graphics Forum
dc.description.volume45
dc.identifier.doi10.1111/cgf.70316
dc.identifier.issn1467-8659
dc.identifier.pages11 pages
dc.identifier.urihttps://diglib.eg.org/handle/10.1111/cgf70316
dc.identifier.urihttps://doi.org/10.1111/cgf.70316
dc.publisherThe Eurographics Association and John Wiley & Sons Ltd.
dc.rightsCC-BY-4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectCCS Concepts: Computing methodologies → Computer graphics;
dc.subjectCCS Concepts
dc.subjectComputing methodologies → Computer graphics
dc.titleLightmap Compression with Color-Coherent UV Clustering and Cascade Texture Optimization
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