October 2018
Beginner
734 pages
22h 15m
English
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Chapter 24
Reflection Models
As we discussed in Chapter 18, the reflective properties of a surface can be summarized using the BRDF (Nicodemus, Richmond, Hsia, Ginsberg, & Limperis, 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 nondiffuse BRDFs.
24.1 Real-World Materials
Many real materials have a visible structure at normal viewing distances. For example, most carpets have easily visible pile that contributes to appearance. For our purposes, such structure is not part of the material ...
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