Thank you all so far
Glad you like it all, the pleasure was mine creating it
@ Dandel0: yes I exported pieces of terrain, grew ivy's on them and imported them back.
@ Kadri: There's one lightsource, a sun with strength @ 5. The reason why some parts look brighter is because they are more directly lit but especially because I have applied a bit specularity to it.
@ Darthvader: yes that's a bit of a problem with the type of strata and this pov. The strata are quite sharp and flat and when you look just "straight" on the edges you won't be able to see the distance between the layers of strata and thus objects appear to be floating, especially when directly lit.
@ njeneb: like Franck (Seth) I haven't been able to figure out which part you mean exactly. So if you could point me to it please then I might fix it since I'm maybe planning to polish this image here and there.
As soon as I have figured out a fool-proof approach to grow ivy's on procedural terrain I will make a tutorial for it. It will probably be a video tutorial. At the moment it is quite some tinkering and too much "if this then that, or..." etc. Will keep you posted.
Cheers,
Martin