I reckon with Fingernail's target platform suggestion, and Kappow's "low end" system, we (well, you guys, cause I don't have D3 just yet) could use the equivelant of the "show stats" feature and come up with some guidline figures to keep the complexity at, for people who are level editing. Good point Renzatic, if Doom 3 plays like Doom 2, with its hundreds of monsters at one time stuff, we should be able to make things look prettier than the original Doom3 levels in our Thief version.