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FSX IS3 Question

When placing objects at the airport I'm currently building, then closing the Sim and restarting the Sim at that airport, the objects have shifted off of their original spots. The shadow associated with the object remains where it should but the objects have moved. I had this problem about 3 years ago and was told how to fix it (Compile the objects in MCX but turn off "Drawcall Batching") in the Options. Sure enough that worked.

BUT, the default objects I'm using (static airplanes) still show the same problem. I checked some of the other sceneries I've done and they don't display this oddity. So it seems to be related only to this area (Idaho).
Is it at a really high elevation? I recall early P3D had ground poly shift at such.
Is it at a really high elevation? I recall early P3D had ground poly shift at such.
Yes, it sits at 6600ft in NE Idaho near Island Park. I suspect that an update to MCX recently may have had an effect on some of the settings in the "Option" menu. I know after fixing the drawcall batching several years ago I went on to do numerous back country strips in Idaho and never had the problem again. . . .until now!