I have a map 8km*8km, converted to world partition. FPS is 90. But when I build HLOD fps drops to 20. I made a profilegpu and first place is prepass DDM_AllopaqueNoVelocity (forced by DBuffer) and BasePass
I Dont have Foliage, and i remove material in Landscape, fps still 20.
The reason is high values of Primitives 100000k - 180000k, as if HLOD does not work. However, if you do Load all region in the editor, then the number of primitives drops to 3000k. And I see that at a long distance LOD4.