Thanks to all. And here the answers. Eric, the tree is Vue, yes.  I have created a Maple Tree and made its trunk invisible. Then I replaced the trunc by two Dead Trees as the image shows and mapped it with a photo. At least I just had to place the leaves in the right way. If you look very close, you can even see the "invisible" trunk. This works fine on lighter backgrounds, but you almost can see here where it is (or where it was). NightVoice, the flowing material were created in zbrush and then imported into Vue. Guitta