Overview In X-Plane, the load order of sceneries is absolutely crucial! The load order of sceneries is defined by the scenery_packs.ini located in the Custom Scenery folder. It is a plain text file, you can open it in any text editor you like (I recommend Notepad++ ). The system is very intuitive, packages higher in the ini have a higher priority. That is, a package at the top takes precedence over a package at the bottom. How to order packages In general, packages should be ordered in the order of Custom Airports/Sceneries > Generic Airports > Overlays > Meshes > Libraries. (Libraries can go anyway actually, doesn't matter unless they conflict, then the one higher takes precedence). So your order should be something like this Custom Airport/Sceneries *GLOBAL_AIRPORTS* Overlays (Y <ICAO> Overlay, X-America, Orbx True Earth, etc) Mesh (Z <ICAO> Overlay, Ortho4XP, AlpilotX HD Mesh, etc) Example Below is an example of how one's scenery_packs.ini might/should look: I 1000 Version SCENERY SCENERY_PACK Custom Scenery/KSEZ - Sedona/ SCENERY_PACK Custom Scenery/1G4 - Grand Canyon West/ SCENERY_PACK Custom Scenery/KDEN - Denver International Airport/ SCENERY_PACK Custom Scenery/KEVV - Evansville Regional Airport/ SCENERY_PACK Custom Scenery/KMMH - Mammoth Yosemite/ SCENERY_PACK Custom Scenery/KTEX - Telluride Regional Airport/ SCENERY_PACK Custom Scenery/KWYS - Forests/ SCENERY_PACK Custom Scenery/KWYS - Yellowstone/ SCENERY_PACK Custom Scenery/X-Codr Designs Library/ SCENERY_PACK Custom Scenery/AEP/ SCENERY_PACK Custom Scenery/Aerosoft - EDDF Frankfurt/ SCENERY_PACK Custom Scenery/Aerosoft - EDLP Paderborn-Lippstadt/ SCENERY_PACK Custom Scenery/Aerosoft - EGLL Heathrow/ SCENERY_PACK Custom Scenery/Aerosoft - LFMN Nice Cote d Azur X/ SCENERY_PACK Custom Scenery/Aerosoft - LFPO Paris Orly/ SCENERY_PACK Custom Scenery/Aerosoft - LPFR Faro/ SCENERY_PACK Custom Scenery/KBTV Burlington/ SCENERY_PACK *GLOBAL_AIRPORTS* SCENERY_PACK Custom Scenery/X-Plane Landmarks - Berlin and Frankfurt/ SCENERY_PACK Custom Scenery/X-Plane Landmarks - Budapest/ SCENERY_PACK Custom Scenery/X-Plane Landmarks - Chicago/ SCENERY_PACK Custom Scenery/X-Plane Landmarks - Dubai/ SCENERY_PACK Custom Scenery/X-Plane Landmarks - Las Vegas/ SCENERY_PACK Custom Scenery/X-Plane Landmarks - London/ SCENERY_PACK Custom Scenery/X-Plane Landmarks - Los Angeles/ SCENERY_PACK Custom Scenery/X-Plane Landmarks - New York/ SCENERY_PACK Custom Scenery/X-Plane Landmarks - Paris/ SCENERY_PACK Custom Scenery/X-Plane Landmarks - Rio De Janeiro/ SCENERY_PACK Custom Scenery/X-Plane Landmarks - Saint Louis/ SCENERY_PACK Custom Scenery/X-Plane Landmarks - San Francisco/ SCENERY_PACK Custom Scenery/X-Plane Landmarks - Sydney/ SCENERY_PACK Custom Scenery/X-Plane Landmarks - Washington DC/ SCENERY_PACK Custom Scenery/Y KSEZ Overlay/ SCENERY_PACK Custom Scenery/Y 1G4 Forests/ SCENERY_PACK Custom Scenery/Y 1G4 Overlays/ SCENERY_PACK Custom Scenery/Y KDEN Overlay/ SCENERY_PACK Custom Scenery/Y KEVV Overlay/ SCENERY_PACK Custom Scenery/Y KMMH Overlay/ SCENERY_PACK Custom Scenery/Y KTEX Overlay/ SCENERY_PACK Custom Scenery/Y KWYS Overlay/ SCENERY_PACK Custom Scenery/Z 1G4 Mesh/ SCENERY_PACK Custom Scenery/Z KDEN Mesh/ SCENERY_PACK Custom Scenery/Z KEVV Mesh/ SCENERY_PACK Custom Scenery/Z KMMH Mesh/ SCENERY_PACK Custom Scenery/Z KTEX Mesh/ SCENERY_PACK Custom Scenery/Z KWYS Mesh/ SCENERY_PACK Custom Scenery/Z KSEZ Mesh/ SCENERY_PACK C:\Users\<your user name here>\Desktop\X-Plane 12\Resources\plugins\SAM\lib\SAM_Library/