View Single Post
Old 09-04-04, 01:18 AM   #16
991060
Whiz Kid
 
Join Date: Aug 2003
Location: Beijng,China
Posts: 241
Default Re: Would you like to see a benchmark demo using PS3.0?

you're gonna need a complex lighting model to take advantages of bynamic branching, or you can apply a more strict limitation on those survived pixels(i.e. cull more unlit pixel, such as using a smaller radius on the light).
IIRC, nVIDIA said there're 2 cycles penalty for each jump in the pixel shader, and according to my own test earlier, the penalty is even bigger. That is to say, if your shader isn't complex enough, the number of culled instructions may be even smaller than the penalty.
991060 is offline   Reply With Quote