I went ahead and posted a more advanced version of the scene. It features tweaks to the arches, the introduction of a real texture, and some flares. I've also managed to complete the stairwell, completed an elevator shaft, placed a few bits on the exterior, and "penciled in" the floors for the 2nd and 3rd story, as well as the accessible roof(plays into the plot). Since snapping this image, I've removed the rugs on the floor simply because they didn't work.

I'm toying with the idea of porting the project over to a totally fixed camera w/prerendered backgrounds(think Grim Fandango, Resident Evil). I really like my Eternal Darkness style swooping cameras during gameplay, so I don't know, yet. Maybe I'll save that idea for the future.