Gouraud Bump Mapping

Abstract

In this paper a new low cost bump mapping hardware is prcsented. The new hardware approach does not rely on per pixel lighting, but instead uses Gouraud interpolated triangles. The bump mapping effect is applied by blending the calculated per pixel bump map color onto the fragment s color. This allows realtime animated distant light-sources to react on the specified bump map. The paper further investigates a number of different variants of recently proposed bump engines. These variants range from lowend PC solution to highest quality high-end solutions.