When coming to create and edit a 3D RealisticTrees layer for use in ArcGIS Pro, it's hard to know how the 3D tree will look.

For that purpose, I've created a Pro Map Package (Local Scene) that will serve as a tree catalog:

http://systematics.maps.arcgis.com/home/item.html?id=620c015ac0844e34b68a4f07a3286880 

*The mpkx was created in Pro 1.4.1

There are 2 straight lined Trees catalogs:

1. A point Layer based on the Preset Realistic Trees that represent all 63 currently supported Tree types in ArcGIS Pro.
2. A polygon Layer Based on LumentRT Vegetation models rpk that represent all 127 realistic models currently available by their rpk.

I hope this package will help working with the Realistic Trees.