Buildings

Would it be possible to make a building hollow inside so the character(s) could go inside? I find it annoying sometimes how buildings don't look very realistic, and in cinematics especially, the camera switches to a landscape that only semi-looks like a building.

-iamunknown73

unless u make a new model then no

Could you make a model to do something like that? Even more inventive, could you make it a door (or doors) that open or whatever?

What i did in my Quest For Glory map was make a building large, and put a cave gate as a door