I don't know if anyone is interested in this but lag was caused by disabled anti-aliasing. Yeah strange. As soon as I turned AA on lag disappeared.

Hey. I bought PA recently and have major problem. Whenever I switch to utilities tab game's performance drops drastically. From 75 FPS to 10-25. Even on fresh world where nothing is built. I have searched forums but couldn't find solution. Strangely, if I change any graphical settings during gamepla...