VMF Diffuse: A Unified Rough Diffuse BRDF
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Date
2024
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Journal ISSN
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Publisher
The Eurographics Association and John Wiley & Sons Ltd.
Abstract
We present a practical analytic BRDF that approximates scattering from a generalized microfacet volume with a von Mises- Fischer NDF. Our BRDF seamlessly blends from smooth Lambertian, through moderately rough height fields with Beckmannlike statistics and into highly rough/porous behaviours that have been lacking from prior models. At maximum roughness, our model reduces to the recent Lambert-sphere BRDF. We validate our model by comparing to simulations of scattering from geometries with randomly-placed Lambertian spheres and show an improvement relative to a rough Beckmann BRDF with very high roughness.
Description
CCS Concepts: Computing methodologies → Reflectance modeling
@article{10.1111:cgf.15149,
journal = {Computer Graphics Forum},
title = {{VMF Diffuse: A Unified Rough Diffuse BRDF}},
author = {d'Eon, Eugene and Weidlich, Andrea},
year = {2024},
publisher = {The Eurographics Association and John Wiley & Sons Ltd.},
ISSN = {1467-8659},
DOI = {10.1111/cgf.15149}
}