» Wed Apr 14, 2010 10:11 pm
It's the Daggerfall engine, XnGine. Whilst it is a true 3D engine, it's not that optimized at complex geometry (such as stacked floors and decorations found often in taverns and palaces).
This came out a year after Quake, and the Quake engine would have made such a stronger base. But Bethesda seems to be against using any revolutionary engines, and always using less-reputable ones or their own in-house technology. :shrug: