This day I used to try out a few DX11 features. Most of the things I tried didn´t work so I don´t think that I will include them in my level.
I tried Tesselation with a few materials but the effect wasn´t very nice. I think the thing why Tesselation fails is that my normalmaps aren´t very good. Finally I added grass to my level. At the place you can see in the picture and at a few more.