ABSTRACT
As we discussed in Chapter 20, the reflective properties of a surface can be summarized using the BRDF (Nicodemus et al., 1977; Cook & Torrance, 1982). In this chapter, we discuss some of the most visually important aspects of material properties and a few fairly simple models that are useful in capturing these properties. There are many BRDF models in use in graphics, and the models presented here are meant to give just an idea of non-diffuse BRDFs.
