steve wrote:it looks rather messy when you get above the roofline (i.e in spectator mode).
For rooftops that are low enough, I'd say texture them. Not everything must be caulked for such minimal savings. For the unavoidable skybrush case, a level-wide playerclip brush to keep spectators from rising high enough to see. Imo the playerclip should be a uniform height (or angled if preferred) in the more open areas if possible, to keep from bumping into invisible barriers. But you probably already thought about these things.