Fully Measured Material Properties
Other software allows you to define BRDF (BSDF) data via parameters of various mathematical functions, but knowing what parameters to set is an open question and even then the scattering behavior of many materials isn't accurately represented by a mathematical function. Although BRDF/BTDF data for standard materials is now being distributed by manufacturers, it is also very important that the optical software company is able to measure custom materials, such as formed aluminum with various levels of polish and anodizing processes. LTI Optics has provided this service since the late 1980’s, longer than any other company, and has more experience in characterizing the important optical properties of materials. Having measured BRDF/BTDF data for the actual materials used in your products is critical to being able to produce accurate simulation results.