Nothing terrific, but the I/O is a lot faster (objects or texture input: 3-4x, video capture: ~10x if display has hardware acceleration).
You find the 3D engine under... http://globe3d.sf.net/
The screenshots come from a custom Doom 3 level called "Pray for Pain", translated into interconnected GLOBE_3D objects by the D3G tool. You can see videos of GLOBE_3D here.
Ada programming
Ada programming