To get the best results and avoid the dreaded "offset map" glitch, make sure your load order is set correctly. Generally, this should sit all your map files (ProMods, Middle East, etc.) in the Mod Manager to ensure it overrides the default background.
Elevate Your Map: ProMods High Quality Extended Background V1.4 is Here! PROMODS HIGH QUALITY EXTENDED BACKGROUND V1.4
Whether you’re running the Great Steppe or venturing deep into the Middle East Add-on, the map covers the entire playable area with high-resolution textures. To get the best results and avoid the