by Wingo » Tue Jan 08, 2008 1:35 am
Heh, sorry I was a bit short. As everyone has said above, it goes in the fsx.cfg file found in C:\[your username]\Application Data\Microsoft\FSX for XP or C:\[your username]\AppData\Roaming\Microsoft\FSX for Vista.
Place the tweak under the [Terrain] heading and reduce the numbers til you get the performance you require. I would suggest keeping the same ratio, or maybe favouring more trees to buildings.
In my experience, I've found that autogen isn't really that bad in FSX. It is the Scenery Complexity that kills my day. That controls things such as cities, airport buildings, and other specific sceneries.