A few nice edit image images I found:
Last tree edit for www.photoshoptalent.com
Image by Robert-P. Pelikan
The last step and result of this project:
I copied the shadow of the tree from original image and fitted it to match the perspective. Then I corrected the size and made it monochrom to match the color-style of the stony underground. Voilá - here it is! The last tree in a world of stone.
You can find the whole contest and all results here: www.photoshoptalent.com/photoshop-picture/4769b51dabe60/L...
All comments, critics and praises ;-) are welcome...