The atmosphere is pretty realistic, but I don't like it how the plants are scattered - some more randomization would be great. Maybe some more clumping vs empty areas? I am surprised how nice the zdepth fog came out. You should definitely check out Corona's volumetric fog, though. :)
Thanks for the reply!
I tried using the 3ds max standard volumetric fog, but somehow I couldn't get it to work nicely with my scene. I'll try the solution in the tutorial too.
I'm not really satisfied with the plants either, I went a little too far with the clumping at first, and then I guess I overdid it in the other direction when correcting. :D Some of the models are single leafs/stems too, so perhaps I should bunch them together a bit more.