I'm still having trouble - but maybe that's just me and my computer.
Did you buy the full version of Terragen? Also, in your text above it would be nice if you expounded a little on the "...high resolution region can be manipulated in Terragen to get a look that suits the season, time of day, and local vegetation" section of the of your instruction. Seems like that's the big key ;-)
Also, in playing with it for 10 minutes I was having trouble getting my terrain file from Terragen into Terranim (Terranim didn't seem to recognize any changes I made with Terragen and it wouldn't show me the DEM in the flight path editor) - do you have any hints for this?aos tv apk