A Wave-optics BSDF for Correlated Scatterers
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Date
2025
Journal Title
Journal ISSN
Volume Title
Publisher
The Eurographics Association and John Wiley & Sons Ltd.
Abstract
We present a wave-optics-based BSDF for simulating the corona effect observed when viewing strong light sources through materials such as certain fabrics or glass surfaces with condensation. These visual phenomena arise from the interference of diffraction patterns caused by correlated, disordered arrangements of droplets or pores. Our method leverages the pair correlation function (PCF) to decouple the spatial relationships between scatterers from the diffraction behavior of individual scatterers. This two-level decomposition allows us to derive a physically based BSDF that provides explicit control over both scatterer shape and spatial correlation. We also introduce a practical importance sampling strategy for integrating our BSDF within a Monte Carlo renderer. Our simulation results and real-world comparisons demonstrate that the method can reliably reproduce the characteristics of the corona effects in various real-world diffractive materials.
Description
CCS Concepts: Computing methodologies → Reflectance modeling; Ray tracing; Mathematics of computing → Stochastic processes
@article{10.1111:cgf.70167,
journal = {Computer Graphics Forum},
title = {{A Wave-optics BSDF for Correlated Scatterers}},
author = {Yang, Ruomai and Kim, Juhyeon and Pediredla, Adithya and Jarosz, Wojciech},
year = {2025},
publisher = {The Eurographics Association and John Wiley & Sons Ltd.},
ISSN = {1467-8659},
DOI = {10.1111/cgf.70167}
}