Hm, yeah the contrast in those mountains turned out a bit to stark: they look washed out. You should have seen more subtle texture and contrast variation. I've attached an image below for reference. Now, bear in mind that this is an image of what the entire height map looks like bump mapped after I did all the sculpting of the height map. Still, you can see all the subtle differences in the mt texture that just aren't there in the image you uploaded. However, this might be due to the scaling method you were working with. Once you rescale them they might look better. Oh, and this does give me a nice little break from academia, so think nothing of it.