I am trying to apply this tuto, and I meet some problems too. My dust is awful and I just can't do the mountains (the tuto begins to be less precize on each step, and I am lost in the too evasive directives)

Is there a tuto which is as precize as the beggining of this one, but for mountains?

And a question: I don't understand why there is a third layer on the three layer method (or whatever is name)... It doesn't change anything on my map...