3D in Aleph One always blows my mind because height is like a pseudo dimension where looking down literally makes everything tilt forward (I'm not kidding, that's how it works).
Replaces the 2d scenery sprites with 3d models in Marathon 1
Note: works best in shader mode.
Make sure bloom is turned off!
Obviously some errors can't be avoided, but I have done my best to smooth over as many bumps as possible.