Hi,This problem is really confusing. Lately I've been adding a dummy RotatedCall command to two big API-macros, and with that I succeeded to remove the autogen elimination those macros caused before. However, now I've noticed a strange thing to the northeast of the airport. Have a look at it from the attached picture. The LOD-squares are all colored in an area that big. Can the RotatedCall command be causing this?This is what I added to the end of the macros:TransformEndRotatedCall( :BA 0 0 0 );;; <--- these linesReturn <--- -"-:BA <--- -"-Return:ExitEndA------So I added those three (3) lines, the rest of the text is just there for you to see where it is placed in the whole code (almost at the bottom, after the TexPolys or Transform End, and before that Return).This has grown to a really frustrating problem now, and I'm happy for all kinds of help!/Sebastian

Another picture describing the alarming size of this bug! In the red circle is the airport, btw.

Just figured out that the problem is not in the RotatedCall. Hmmm...what else could be causing such a side effect?

PROBLEM solved. It was in a terrain file created by FSTC + resample.exe - some hand-editing of the result had caused that.