Hi again ! I’m also new with the world partition but let me try to help:
Try those commands so you can get an idea of the streaming process :
wp.Runtime.ToggleDrawRuntimeHash2D
wp.Runtime.ToggleDrawRuntimeHash3D
First off please be aware of the fonction ‘‘Is Spatially Loaded’’;
Is Spatially Loaded Determines if the Actor is spatially loaded:
- If enabled, this Actor is loaded when in range of any streaming source when not assigned to a disabled Data Layer.
- If disabled, this Actor is loaded when not assigned to a disabled Data Layer.
Have you fiddle with the Runtime Hash grid for the world partition?
Did you name the grid (Main Grid) it and assign Player and landscape ?
Other ideas to fix this issue would be :
-Are your actors placed like foliages and automatically assigned to the landscape or have you made data layers separatly and they are always turned on or they are just unassigned ?
-For actors disappearings in-game I believe its probably due to either LOD set to 0 of your material (or just wrong settings) or HLODs not set or working properly (try rebuilding physical material + HLOD and reassign). Another avenue could be from your landscape material or foliage is/are too heavy on memory (try to lower your landscape components from 5x5 and see if it fixed it for you)
World Partition in Unreal Engine | Unreal Engine 5.0 Documentation[World Partition in Unreal Engine | Unreal Engine 5.0 Documentation]