I have Trees that are spawned from the Landscape material and I want to be able to select it in the viewport,. Is this even possible?
Via code only.
You have to run a line trace, against visibility, and use the instance ID to access the instance.
Its bot the easiest, but the line trace should return everything you need to target the specific instance.
Ps: surely you know, grass node offers no collision… not ideal for trees normally.