It can be a huge time saver to spread out all of our trees and large rocks, across our terrain procedurally, instead of placing them by hand. Procedural Foliage Volumes in UE4 and UE5 allows us to do this automatically and should be used with larger objects like Trees and Big Rocks because it allows for collision on those objects.

Here’s a great tutorial by the YouTube creator Nitrogen on how to get started, using the Procedural Foliage Volume system in Unreal Engine.