;D
Looking good! (Fun, isn't it? ;D )
Maybe try introducing several plants for the ground cover, and mask the populations with power fractals to mix up the distributions. There are a couple of tutorials here on that subject that I can't seem to find right now. I'll post a link when I run across them.
In the meantime keep those renders coming.
Agree in all points :)
Anyway the BW version is very cool! :)