ABSTRACT
In Chapter 3, we described how to implement bump mapping-the popular and long-lived method that enables apparent surface detail to appear on the surface of a rendered object without perturbing the surface geometry. In this chapter, we will look at ways to expand this illusion. We want to do this by retaining the overall advantage of bump mapping-that it is a texture map approach. In particular, we want to be able to map relief textures onto an arbitrary polygonal model.
