Spherical Harmonic Exponentials for Efficient Glossy Reflections
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Date
2025
Journal Title
Journal ISSN
Volume Title
Publisher
The Eurographics Association and John Wiley & Sons Ltd.
Abstract
We propose a high-performance and compact method for computing glossy specular reflections. Commonly-used prefiltered environment maps have large storage requirements and high error due to constrained treatment of view-dependence. We propose a factorized spherical harmonic exponential representation that exploits new observations of the benefits of log-space reconstruction for reflectance. Our method is compact, properly accounts for view-dependent reflections, and is more accurate than the state-of-the-industry solutions. We achieve higher quality results with an order of magnitude less memory, all with efficient and alias-free reconstruction of glossy reflections from environment lights and continuously-varying material roughness.
Description
CCS Concepts: Computing methodologies → Rendering; Reflectance modeling
@article{10.1111:cgf.70219,
journal = {Computer Graphics Forum},
title = {{Spherical Harmonic Exponentials for Efficient Glossy Reflections}},
author = {Silvennoinen, Ari and Sloan, Peter-Pike and Iwanicki, Michal and Nowrouzezahrai, Derek},
year = {2025},
publisher = {The Eurographics Association and John Wiley & Sons Ltd.},
ISSN = {1467-8659},
DOI = {10.1111/cgf.70219}
}