>>6087736So I've done a pretty basic tutorial on some mountains.
It's mainly manipulation of a plugin inside blender.
Outside it would work a little differently, you would take a subdivided plane, and manipulate points on the z axis till you get something you like.
anyway, here's the tutorial.
My mic sucks, but hopefully the information is understandable.
https://www.youtube.com/watch?v=pu7DNU21X3c&feature=youtu.be