Voodoo Extreme -- Id traditionally provides the fastest engine out there for the game types that it does. Bearing in mind that Doom3 is going to be far more single player focussed, is there any change in focus from making the engine the fastest it can be, to more of a designer / content friendly environment - bearing in mind that probably 75% of a single player content is designer built?

[John Carmack] -- Yes. I am spending a huge amount of graphics horsepower to allow the engine to be flexible in ways that game engines have never been before. It is a little scary to drop down from the ultra-high frame rates we are used to with Q3, but I firmly believe that the power of the new engine will enable a whole new level of game content.
I am hoping that the absolute top-of-the-line system available when the game ships will be capable of running it with all features enabled and anti-aliasing on at 60hz, but even the fastest cards of today are going to have to run at fairly low resolutions to get decent frame rates. Many will choose to drop a feature or two to get some speed back, but they still won't be able to get near 60hz.