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Real-time rendering of layered materials with anisotropic normal distributions | TUP Journals & Magazine | IEEE Xplore

Real-time rendering of layered materials with anisotropic normal distributions

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Open Access

Abstract:

This paper proposes a lightweight bidirectional scattering distribution function (BSDF) model for layered materials with anisotropic reflection and refraction properties....Show More

Abstract:

This paper proposes a lightweight bidirectional scattering distribution function (BSDF) model for layered materials with anisotropic reflection and refraction properties. In our method, each layer of the materials can be described by a microfacet BSDF using an anisotropic normal distribution function (NDF). Furthermore, the NDFs of layers can be defined on tangent vector fields, which differ from layer to layer. Our method is based on a previous study in which isotropic BSDFs are approximated by projecting them onto base planes. However, the adequateness of this previous work has not been well investigated for anisotropic BSDFs. In this paper, we demonstrate that the projection is also applicable to anisotropic BSDFs and that the BSDFs are approximated by elliptical distributions using covariance matrices.
Published in: Computational Visual Media ( Volume: 6, Issue: 1, March 2020)
Page(s): 29 - 36
Date of Publication: March 2020

ISSN Information:

Waseda University, Tokyo, 155-8885, Japan
The University of Tokyo, Tokyo, 153-8656, Japan
Intel Corporation, CA, 95054, USA
Waseda University, Tokyo, 155-8885, Japan

Waseda University, Tokyo, 155-8885, Japan
The University of Tokyo, Tokyo, 153-8656, Japan
Intel Corporation, CA, 95054, USA
Waseda University, Tokyo, 155-8885, Japan