An Anisotropic BRDF Model for Fitting and Monte Carlo Rendering

Abstract

In this paper we propose a new physically plausible, anisotropic Bidirectional Reflectance Distribution Function (BRDF) for fitting and for importance sampling in global illumination rendering. We demonstrate that the new model is better in data fitting than existing BRDF models.

We also describe efficient schemes for sampling the proposed anisotropic BRDF model. Furthermore, we test it on a GPU-based real-time rendering algorithm and show that material design can be done with this anisotropic BRDF model effectively.

We also show that the new model has effective real-time rendering performance.

Keywords

• BRDF representation
• Anisotropic reflection model
• Monte Carlo rendering
• BRDF data fitting