VMF 漫反射：统一的粗糙漫反射 BRDF

IF 2.7 4区计算机科学 Q2 COMPUTER SCIENCE, SOFTWARE ENGINEERING

Computer Graphics Forum Pub Date : 2024-07-24 DOI:10.1111/cgf.15149

Eugene d'Eon, Andrea Weidlich

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引用次数: 0

摘要

我们提出了一种实用的分析 BRDF，它可以用 von Mises-Fischer NDF 近似处理来自广义微面体积的散射。我们的 BRDF 可以无缝融合光滑的朗伯场、具有类似贝克曼统计量的中等粗糙高度场以及先前模型所缺乏的高度粗糙/多孔行为。在最大粗糙度时，我们的模型还原为最新的朗伯球 BRDF。我们通过与随机放置朗伯球的几何散射模拟进行比较，验证了我们的模型，并显示出相对于粗糙度极高的贝克曼 BRDF 的改进。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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VMF Diffuse: A unified rough diffuse BRDF

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 Beckmann-like 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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来源期刊

Computer Graphics Forum 工程技术-计算机：软件工程

CiteScore

5.80

自引率

12.00%

发文量

175

审稿时长

3-6 weeks

期刊介绍： Computer Graphics Forum is the official journal of Eurographics, published in cooperation with Wiley-Blackwell, and is a unique, international source of information for computer graphics professionals interested in graphics developments worldwide. It is now one of the leading journals for researchers, developers and users of computer graphics in both commercial and academic environments. The journal reports on the latest developments in the field throughout the world and covers all aspects of the theory, practice and application of computer graphics.