Slightly absorbing blue-green dielectric (η = 1.5) α = 0.05 α = 0.05 Textured diffuse layer Clear dielectric (η = 1.5) α = 0.05 Red anisotropic scattering diel. (η = 1.5, g=0.95) α = 0.1 α = 0.1 Purple anisotropic scattering diel. (η = 1.5, g=0.8) Thin blue absorbing dielectric (η = 1.5) α = 0.1 α = 0.1 Conductor (copper) Blue isotropic scattering dielectric (η = 1.5) α = 0.1 α = 0.1 Conductor (Aluminum) White isotropic scattering dielectric (η = 1.5) α = 0.04 α = 0.04 White isotropic scattering diel. half space (η = 1.5) α = 0.1 White isotropic scattering dielectric (η = 1.5) Measured BRDF (Blue metallic paint 2, [Matusik et al.]) α = 0.1 Measured BRDF (Blue metallic paint 2, [Matusik et al.])Conductor (chrome) α = 0.02 Figure 1: All materials in this interior scene were generated and rendered using the techniques described in this paper. The insets on the left and right reveal the corresponding structural descriptions that were used as inputs to our system. AbstractWe present a general and practical method for computing BSDFs of layered materials. Its ingredients are transport-theoretical models of isotropic or anisotropic scattering layers and smooth or rough boundaries of conductors and dielectrics. Following expansion into a directional basis that supports arbitrary composition, we are able to efficiently and accurately synthesize BSDFs for a great variety of layered structures.Reflectance models created by our system correctly account for multiple scattering within and between layers, and in the context of a rendering system they are efficient to evaluate and support texturing and exact importance sampling. Although our approach essentially involves tabulating reflectance functions in a Fourier basis, the generated models are compact to store due to the inherent sparsity of our representation, and are accurate even for narrowly peaked functions. While methods for rendering general layered surfaces have been investigated in the past, ours is the first system that supports arbitrary layer structures while remaining both efficient and accurate. We validate our model by comparing to measurements of real-world examples of layered materials, and we demonstrate an interactive visual design tool that enables easy exploration of the space of layered materials. We provide a fully practical, high-performance implementation in an open-source rendering system.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.