This discussion is to clarify the order your addon scenery should be in when using Orbx addon scenery.
scenery libraries (e.g. FlyTampa, 29Palms / other than ORBX)
city and POI sceneries (e.g. landmarks)
area sceneries (e.g. Aerosoft’s Night Environment)
FTX_AA_xxx (ORBX Airports – several entries)
FTX_EU_xxx (scenerie europejskie – several entries)
… (FTX NA, FTX AU)
ORBX!OPENLC_EUROPEx (openLC Europe – several entries)
ORBX!OPENLC_NAMERICAx (openLC for Northern America – several entries)
ORBX!OPENLC_BASE (openLC base)
other landclass add-ons (e.g. Scenery Tech – Africa)
FreeMeshX-xxx (FreeMeshX folders or any other mesh you use – several entries)
… (all named FSX sceneries)
… (all numbered FSX sceneries)
(optional / deselected!) FS9 World Scenery
I hope this helps anyone with scenery issues.