ok, if if doesnt matter in any "I need to give this brush a key" kinda way, which creates a better fps, brushes, or patch-meshes?
That depends on the situation, really.
It more depends on the number of tris drawn than the form of the tris.
ok, how bout if its big and flat?
Again, the depends entirely on the situation. If there is stuff next to it, it'll split for T-juns, but generally, they're just as expensive on the polies.
it'll split for T-juns
what does that mean?
other than that, thanks
just use a brush and use the caulk texture on the faces that will not be visible to the player. The reason I suggest this is that patches can be a pain in the arse and are much more difficult to texture correctly.
Make it detail (ctrl-d) if it's not forming part of the hull.
What exactly are you trying to do here anyay?