Having several problems with World Partition streaming Instanced Static Meshes, and minimap gen

[userresu]

Hey I might have found something:

World partition instanced static meshes are loading incorrectly

Yeah I will once I finally do . No actually they made a plugin for reading alembic point clouds generated by houdini. Its called rule processor and it’s parsing the data and spawning actors with ism components which is of course working for their project.

So based on Aris answer if the bounds of an ISM overlaps 2 cells it gets promoted to a higher level cell. In my case it got promoted to the persistent level and never got unloaded. I checked the matrix demo config and found this line which defaults to false:

wp.Runtime.RuntimeSpatialHashPlaceSmallActorsUsingLocation=1

The full config is like this:
[SystemSettings]
; World Partition
wp.Runtime.RuntimeSpatialHashUseAlignedGridLevels=0
wp.Runtime.RuntimeSpatialHashSnapNonAlignedGridLevelsToLowerLevels=0
wp.Runtime.RuntimeSpatialHashPlaceSmallActorsUsingLocation=1
wp.Runtime.RuntimeSpatialHashPlacePartitionActorsUsingLocation=0

Let me know if it solves your issue as well.