VMF Diffuse: A Unified Rough Diffuse BRDF

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Date
2024
Journal Title
Journal ISSN
Volume Title
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.
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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
} }
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