I just tried it. I divided the cell size and loading range by 4 to about 3200 and 6400. This kinda helped, it brought down the memory by about 2k in all parts, not sure if I should lower it more. Couldnt find anything on the building HLODs, and couldnt figure out any of this “Or you can copy or save your Landscape to put it on a lower resolution landscape. Either by exporting your heightmap and layers or by using the copy gizmo.”