ABSTRACT
The first use of texture mapping in computer graphics was to define the color of an object. But texture mapping can be used when we want to specify any surface property with more granularity than at the vertex level. The particular surface property that perhaps is closest to controlling its “texture,” in the sense most laypersons would understand it, is actually the surface normal. Bump mapping is a general term that can refer to at least two different methods of controlling the surface normal per texel.
