Paper on Modeling Anisotropic Scattering Surfaces
July 2000 - ORA's Eric Fest and David Jenkins will present a paper at SPIE in San Diego on the scattering methods developed for LightTools 3.0. The paper, entitled "Modeling Anisotropic Scattering Surfaces in Illumination Software," is part of the session "Scattering and Surface Roughness III." Here is a brief abstract of this paper:
Many surfaces scatter light in an anisotropic way, that is, for a normally incident beam, the distribution of scattered light varies as a function of the azimuthal angle of the scattered direction. Examples of surfaces with anisotropic scattering characteristics are brushed metal reflectors and certain types of diffusers. A model, based on an anisotropic scatter model proposed by Ward, is introduced. The ability to fit this model to various sets of measured BSDF data is investigated. Ray tracing simulations are performed using the fitted parameters, and the results are compared with experiments.
