Hola! If I could manage this in Unity, it would be so useful:

I've got Houdini Engine for Unity creating a bunch of trees and terrain detail for me, and I'm currently creating a slot for every detail layer and tree prototype that I need. This is resulting in creating a lot of repetitive slots once I get into ingesting model variations of detail that I'm propagating across the terrain. See attached image, and imagine the amount of slots getting way, way more plentiful once I start adding model_variation_1, model_variation_2, etc.

Is it possible to feed Houdini Engine a list of prefabs, rather than single prefabs? If I could just drop a group of prefabs into the asset parameters without having to "hard-code" every slot, that would be amazing. And to be clear, I'm talking specifically about terrain trees and detail.