Okay, so I've tried to make flatten switches for a couple add on airports (FS2000 and 2002), but I can not the dang things to work. I continue to get bumpy taxiways on these airports. I've changed the elevation so that the plane sinks halfway into the ground, all the way up so that the taxiways are blanked out. Anyone know a thing or two about flatten switches that can help me out a bit?Thanks!Rob Diebold(If I start from scratch, I can do it, but who's got that kind of time?) :):-beerchug

A flatten switch does not help to remove the bumpy taxiways. A flatten only makes the ground hard, so you do not fall into it.To remove the bumpyness you should use SurfaceType commands. If you take a look at the SCASM tips section of my website (click on the banner below) you will find an example there.Arno

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Member Netherlands 2000 Scenery Team[a href=http://home.wanadoo.nl/arno.gerretsen]http://home.wanadoo.nl/arno.gerretsen/banner.jpg[/a]

Thanks Arno. I'm heading over there now.Rob:-beerchug