Default buildings with full interiors

[Simon]

I can see 2 reasons not to do this, at least not for awhile:

1. Rendering/fps/computer issues.  I'm no whiz with this sort of thing, but I seem to remember the old models being complete, inside and out, was a cause of some strain on some systems.

2. Defense mechanism.  People who want complete models (like the the OP) will be discouraged from invading my plain, propstyle cities. :p