"Doom3 is up to 112% slower than the 6600GT"
- Nvidia PR doing the math. The X700 apparently renders at a negative framerate in Doom3.

Fragment level phong illumination
Thursday, February 13, 2003 | Permalink

PhongIllumination.pdf (158 KB)
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This article goes through the whole process of creating fragment level phong illumination lighting. Both the theory and implementation is explained in detail. Pixel and vertex shader version 2.0 in DirectX 9 is used for the implementation.

This article was also published in the Shader X II book.