I know using two different terrain mesh installations sounds pointless, but I am wondering if FS Genesis and FS Global Americas installed together will cause any issues. The reason I'd like to do this is I only have The Americas from FS Global, but much much more from FS Genesis. I figure that FS Genesis will take over when I'm out of the Americas range- is this a correct assumption? Also, for the areas that are covered by both, FSX will render the highest detail resolution, be it FS Genesis or FS Global. Is this correct?

 

Thanks in advance for any thoughts or ideas!

FSX will display the mesh with the highest LOD, so you can run both. After all you will be running the addon mesh together with the default mesh, so in reality you'll be running three meshes at the same time for America.