In fact I do. I've been working with the Source SDK for over six years now.

@big nig scrappy Well you clearly don't know how to map properly then. Do you?

Do you not know how to make a prop use its bounding box for collisions? Because it's quite literally one click per prop, even less if you batch select it.

Bounding box? Are you high?

In that case, enable "Use bounding box" for the collisions on everything except the corner pieces. Same effect and less brushes.

They are not. They are placed so that you do not get stuck (or randomly stop walking) when walking in a slight angle against them. This is because of multiple props being used as one whole. Common sense.