Hi, I've added a new runway to an airport with FSX Planner and the default terrain clips into it, so I found FSX KML so that I could try and flatten the terrain, apply the default airport texture and get rid of autogen. I drew a polygon in GE, imported it and used the Airport_Backgrounds_Flatten_MaskClassMap_ExcludeAutoGen tag on it. The end result was far from satisfactory and I've included a screenshot to better describe what's going on in hopes someone knows a solution.
If all else fails, all I'm looking for is a way to prevent the terrain from clipping into my new runway, so whatever commands does simply that is what I'd like.

If all else fails, all I'm looking for is a way to prevent the terrain from clipping into my new runway, so whatever commands does simply that is what I'd like.