6. Press SELECT-INVENT and choose the gradient tool. Pick two colours (black and white). and apply it to the picture.
7. Now make a new layer filled with any colour.
8. Choose bumpmap on the colour layer and pick the “mountain” layer. Now you can choose how you want your mountains to look like.
9. Now you have a very big mountain region. Try to change the mountain colours to another colour an so on.
I hope this was a for some help