Some DOOM3 tidbits
 

After reading a post in our forum about the NV30-specific rendering path purportedly being removed by DOOM3's lead programmer John Carmack, I asked John if this was indeed true (and took the opportunity to ask a couple of other questions) :

I'm hoping you can clear up some apparent confusion about DOOM3's rendering paths.

1) There is word that you have removed the NV30-specific rendering path
2) The reason for the above is apparently because NVIDIA's drivers have improved to the point where NV3x hardware are running the standard ARB2 path at about equal speed with the NV30-specific path

http://www.beyond3d.com/#news12006