Is there a way to manually generate HLOD clusters?

Is there a way to manually generate HLOD clusters? For example I want to create a new cluster and just drag and drop selected meshes that i want in that cluster.

Yes, you can do this via the HLOD outliner. As long as you’ve generated clusters, you’ll see your list of HLOD actors under the “Scene Actor Name” list. Then you can select the HLOD listed and right-click any actor listed under that specific cluster and choose to remove it from the list. To add you can simply drag and drop from the World Outliner panel onto the HLOD actor for it to populate under that specific one.

Is there a way to create new clusters from scratch?

By using a Hierarchical LODVolume from the Modes panel you can.

is there anyway to use both methods together? Because when i use a volume it just is a large range volume to encompass the entire level/building. And after that only 1 cluster is created. (distance based settings dont have any effect for cluster generation.)

Or can volumes intersect as in a big huge one then a bunch of small ones inside of it ? Does each volume create 1 cluster? Because ive seen a volume create 2 closters before for some reason even though the volumes size is huge like 50k x 50k