Wow, thanks so much for your valuable advise. Iām such a newbie 
Here a picture of the new result and the overview of the materialsetup. Hope I did it right. The only thing I like to know is how they manage it to give the leaves two different colors. In the texturemaps are two leaves: yellow and red. But how do you use them together? Or is that only possible in another application and after some actual rendering? 
