In the starting position in a mission I've attached to the ticket I get 27 fps when 2x AA is on but 19-20 fps with it off.

However turning it on for all other non-forested areas actually takes away FPS instead of increasing it (which is a logical behavior)

So I'm forced to constantly switch between having 2x AA on and off when I'm in and out of the forest to keep the game playable. {F18288} {F18289}