ok, im into similar territory now with my track. made entirely with BTB and photoshop, with some help from folks donating some models.
however, the 'finishing touches' just arent there, the tree textures are dodgy as per the OP's problem, and theres little 'sins' with overlapping terrain at road junctions etc etc.
obviously 3dsimed can fix these? i hate learning new software, so can someone break it down for an idiot like me? is 3dsimed easy enough to use? can you import the project back and forth between btb and 3d sim ed, or is it a 'one way' process only?
to the OP, how did you get your tress looking like that in 3dsimed? tips and hints?
cheers
ed