Adding form to the foothills

So with my background mountains all done, I want to address the top of this…tree line just a bit.…Since I used that layer-extraction technique to separate these foothills from…the rest of the image, I've gotten a very aliased edge, and it doesn't look like…a natural tree line.…Before I fix that, I want to organize this painting a little bit better.…The snow would actually be in front of the foothills and the foothills would be…in front of the mountains.…I don't have it that way right now. And I'm going to move the snow up to the top…and the foothills into the middle and then the mountains into the background…and the copy of my plate in the very back.…

Now I'm going to return to my Painting layer, and I saved that brush that I used…to paint all of the trees and I called it Foliage.…I'm going to select that brush because I liked how organic it was, and I'm…going to zoom in on the top of my tree line.…First I want to brighten the top of the tree line and I also want to regularize…it so it looks more like a natural tree line and not this jumpy aliased edge…