id programmer John Carmack made two posts to a recent Slashdot article (post 1 / post 2) regarding next-gen graphics hardware, its effect on games, and most importantly, its effect on the new Doom engine. Here\'s some of the good stuff:
Obviously, any game done with the new Doom engine is going to run slower than a game done with Q3 technology. You can make some of it back up by going to the simpler lighting model and running at a lower resolution, but you just won\'t be able to hit 60+ fps on a GF2. The low end of our supported platforms will be a GF1 / 64 bit GF2Go / Radeon, and it is expected to chug a bit there, even with everything cut down. [...] We are aiming to have a GF3 run Doom with all features enabled at 30 fps. We expect the high end cards at the time of release to run it at 60+ fps with improved quality.A GF3 will run the new Doom at 30 FPS? That goes a long way towards showing how big a jump the engine will be over Quake 3, which runs on the GF3 with all the bells and whistles at something like a hundred FPS.
The standard lighting model in DOOM, with all features enabled, but no custom shaders, takes five passes on a GF1/2 or Radeon, either two or three passes on a GF3, and should be possible in a clear + single pass on ATI\'s new part. It is still unclear how the total performance picture will look.