Material Modeling with Physical Constraints

Abstract

The workflows and interfaces of commercial rendering software are currently designed for believable rendering purposes. However, for predictive rendering other approaches are needed; for example, the usual approach to describe a material or a colour is to use RGB values for diffuse and specular. Since these parameters do not have a physical meaning, these approaches are clearly not suitable for physically based rendering and in particular predictive rendering where we have to deal with complex BRDFs. An investigation is missing on how existing workflows have to be changed and expanded to make them suitable for predictive rendering without losing existing workflows.