Just installed a patch, I read this in www.rage3d.com
, it was said that this patch can increase the performance while playing doom 3 for ATI Card quite significantly...Here's few quote from the website..
"“When I read the shader it striked me how many texture accesses it did compared to the relatively short shader, even for stuff that could just as well be done with math for a small cost in instructions. Using a dependent texture lookup for POW evaluation makes a lot of sense for R200 level hardware due to instruction set limits, but for R300 and up it's much better to just spend the three cycles it takes to evaluate POW with math instead of risking texture cache trashing with a dependent texture read, which may be much more costly, especially since the access pattern in this case will be far from linear. Also, using math improves the quality too, even though it may not be very noticable in this game,”http://esprit.campus.luth.se/~humus...rmanceTweak.rar
Yep, I put that file in Doom 3 folders, turn on the timedemo1 (800x600, All on except Specular)... Before i installed that thing, the result is 26 (Forgot bout the actual speed :P) After i installed that thing, the speed increase quite significantly to 33 fps. Not that high, but its quite good though... U guyz should try this