= Bump Map =
 * [http://developer.nvidia.com/object/texture_space_bump_mapping.html Texture Space Bump Mapping] - very good
 * [http://www.blacksmith-studios.dk/projects/downloads/bumpmapping_using_cg.php bumpi] very detailed and good tut
 * [http://www.paulsprojects.net/tutorials/simplebump/simplebump.html another bumpi] big and detailed
Stichwort:  Simple DOT 3 BumpMap