Pattern/Texture Mapping

Adding details or features (variations in color or texture) to surfaces.

Pattern Mapping Technique -- Modulate the surface color calculated by the reflection model according to a pattern
defined by a texture function. (This could be a digitized image or a procedurally-defined pattern.)

2-D Texture function: T (u,v)

Inverse Pixel Mapping (Screen Scanning):

For each pixel on screen ( xs , ys )