Dear Brian, Thank you very much for your exact and nice Ideas.
About the stamp really you'r right and it was a pro point
I have used 3dmodels (Proxy) as plants, in middle of image or on background.
So there was not a soft or ample treeline.
I have bought a totaltextures of plants (trees) I hope they help.
I will test it and put my result images as soon as possible.
Thanks.