That, I think is a "use to could" for BTB. When one could use sketchup to xpack a terrain as an object. Not at all easy for a mountain terrain and now you need sketchup PRO for that.
RTB is cheaper and basically does all the terrain building with google earth images without sweating.
The only other way, besides pulling all the landscape manually, was with The Zaxxon Method which uses scripts to take the terrain from SAS Planet (a sort of russian Google Earth), and import into BTB. Since I have installed windows 10, that method doesn't always work and as its quite a long learning curve, to find it hasn't done it's job, is a pain.
So I would say for a BTB 3D landscape it's No. Move to RTB.