when using a huge brush as a building that the player wont enter (it just for show) is it better to have the brush solid or hollow?

would a solid one use up more system resources then a hollow one?

-patch

I would say solid because then you'll cut down on an unnecessary number of faces and brushes for that matter. Too many brushes will slow down your map and increase your compile times. It just wouldn't make sense IMO to make it hollow if you cant get inside it, unless maybe you want to be able to look in the windows to see the inside.