Alpilotx has finally released the UHD Mesh v4. It offers a much finer resolution of the height profile (30m DEM) and a much finer landclass resolution than the Default Mesh or the HD Mesh v4 in selected areas.
Contrary to P3D, FSX or FSW this Mesh doesn´t only influence the height of the land but also the position and resolution of forests, roads mountain peaks and cities. So X-Plane has a much better knowledge of the height of buildings in a given area, the number of trees and so on.
Due to its bigger size it also uses more RAM. 16 GB RAM can be considered the bare minimum, 32 GB are recommended.