How to build a 3D tree

[hachBORHSO]

With my 64-bit operating system,I want to build a 3D tree, a house.if that's not possible ,how do I put the 3D tree on the map ? What program should I use outside of terrain editor ?

thankyou..

[+Wrench]

only the terrain editor can import "solid objects" and "alpha objects"

How that works, I've never found out either, but there is a function someplace

If you're talking about terrain objects (warehouses, runways, hangars, etc). That's a compltely different story

[hachBORHSO]

thank you for your answer @Wrench.I've already tried these ways and failed.another problem is that I want to shadow Alpha objects,I select the shadow option in the terrain editor,but I failed to shadow Alpha objects, do you have any suggestions on this ?