With the next version we will go way beyond what has been available before and develop natively parallel for Aerofly FS2 and some other sims.
Just a few details as a start:
We purchased stereo satellite imagery that was manually placed to get as much detail as possible from all perspectives of each mountain. In addition to that we're in the process of placing roughly 150 million (!) trees.
Screenshots show "work in progress" in Aerofly FS2.