animagic (3/23/2019)
The only way to do that AFAIK is to add the props to the terrain. You can then save it as scene, which would also include any plants and trees.
You can then load the scene in another project and if so desired convert the former prop elements back to prop.
What do you mean by ADD props to the terrain? I tried to parent or attach anything to the terrain... doesn't work. I tried selecting props and terrain and save as terrain and I save only the ground plane.
iScene is still a mystery.