Just wanted to say, dont use blocks at all. Only for ground structure for example.
Few days ago i buyed some nice houses with indoor modeling for only 30$ btw. If u want to have good performance a lot of tricks must be done ( like no faces below the floor etc, a hollowed block exported to mdl isnt a good solution ). Just want to say building such models (rendering fast) isnt a easy task
If you using shadeC reset the dynamic flag of the houses later, if not your framerate will "Crash" ^^
With those indoor "and" outdoor maps u must really use every trick available ( LOD...... )
edit: Good News is it seams to be possible with high fps ( i recognized in "Setting up shadec evo" thread ).
Greets and good luck!