Excellent colour and design there. I don't mind at all that there is less atmospheric perspective than entirely realistic; the result is the distant terrain looks stark and clean which is very pleasing IMHO. The foreground plants are excellent.
I like the colour of the material mix and the ground populating plants, they're really nice
There's something funky with the scale though, I think it might be because the plants aren't populating over the entire terrain so the background part looks like it should be *waaayyy* off in the distance, I think that was probably a choice made to speed the render up possibly?