I’m new to Unity, but I can tell already that I like it. My only issue is the lack of depth perception in the default Unity level editor; it’s hard to get objects aligned just right when you can’t properly judge how far away something is. Hell, I even have a hard time telling if my treasure chests are touching the ground or not! It’s usually the case that the items I place are either floating above the ground slightly or clipping slightly with the ground.
What I want to do is use an external level editor, such as Hammer, UDK, or Getic, to make my level geometry and then import it into Unity. How would I go about doing that? Would it be possible to export it from my external editor into a Unity scene file, or would I have to export it as a 3D model and then import the model?