not to be arrogant or anything, but what are you trying to do, 3D graphics are simply an illusion, there are many workarounds to the "too many poly's" situation, most of the time, using a 2D approach to background trees is the most common ie, sprites, sometimes rendering real 3D trees and using them as a bacdrop is another.
Too often people try to do everything 3D and end up with humongous scene files that are impossible to render. Then there is the Vue infinite solution, import your LW objects into the Vue world and go from there, or vice-versa. Most solutions involve many other applications or plugins. You can create anything but rendering can be a real problem.
