So I have finally gotten to the point where my map takes ages to compile, and it literally uses up the entirety of my processor for most of the process. Which means I can't do anything else with my computer while I wait. And I'm thinking, it's a multi-threaded process; I have four cores; there's gotta be a way to make it so vrad, vvis, etc. only use three when they run. But I have no idea what it is. The properties window didn't have anything useful. This is in Windows 7, and I could swear I saw a tool like this at one point, but can't for the life of me remember what or where it was.