"When creating levels, where you have many brushes on the same plane (z axis) does the wall thickness have an effect on how Quake draws the level? Also, does overlapping brushes have any positive or negative effects on the frame rate?"

- KillMe

...as long as the connections between the brushes (where they meet) is not too thin (one pixel), it shouldn't matter.

[regarding overlapping brushes effecting framerate]...not that I know; especially if the brushes are rectilinear. When I make mountains (very non-rectilinear), I let the irregular shapes butt right into each other. BSP takes care of everything from there. The irregular shapes themselves can slow things down, but there connections to each other do not.

- Levelord