Megascenery recommends the following tweak to FS9.cfg: TERRAIN_EXTENDED_LEVELS=1 [WAS 1242456]Can anyone explain to me what this represents? To change from 124256 to 1 seems like a huge difference. Why should this be necessary?Greg

Well it was 1 or 4 or something (can't remember) in FS2002 so it was Microsoft who introduced this dramatic change in the first place.

It's really interesting (in addition to Jimmi's comment), if you were to delete the fs9.cfg and rebuild it, a rather crazy value gets entered into this field. Whether it is 1, 5, or 500000, I sense that FS9 may not be using this field as it was understood to work in FS2002. It's never been an officially documented parameter--only casual observations by some of us here have hinted at its purpose, if any.I would try it with the default value, with Megascenery's recommended value, and judge for yourself whether it is making a difference. I somewhat suspect the odd default value in the FS9.cfg may be a glitch related to this field.-John

"I somewhat suspect the odd default value in the FS9.cfg may be a glitch related to this field."Quite possible. I mean if Microsoft removed the routines related to this setting it's quite possible that FS is just spitting out a semi-random value into the FS9.cfg file when (re)creating it and never actually reads it.At least one of the two lines above it (extended_radius and default_radius) do make a small difference however. I set both to 9.50000 which makes distant scenery slightly sharper (compared screenshots).