I have created a few airports alrady, but everytime I make a brand new one the airport scenery seems to hover over the ground scenery even though both are at the same altitude. I have used a flatten tool to flatten the terrain around the airport, but the airport textures and the ground textures aren't bound together. How do I bind them?

How did you measure the altitude of the scenery? If you used the altitude as displayed in FS, then it is probably the altitude of the reference point of the aircraft and not the ground (for a Cessna the difference is about 4 ft).

I often use the map elevation and it works fine. I get it off the airport data. Just remember, not all of the airports are correct though.Arno's method works also. I use 3.5 feet instead of 4(with the cessna) seems to work correctly.Hornit

The default (and other LWM) flattens are defined in meters and 1/128ths of a meter. Default airport scenery is defined at .001 meters. TDFCalc2004 will show the LWM height and height fraction (in game). JABBGL will show the airport, start, and runway elevations to .001.I don't know if there is a minimum difference in elevation that must be present to prevent texture flashing which I interpret as a z-buffer issue (maybe someone can confirm this).scott s..