Good topic. Indeed, the game is a bit darkish, but hey! We've only seen the screens from the first act and the ones from the mushroom imp village, which had grass.
Also DD had a quite few dark dungeons. That's the point of dungeons, I might add: breeding ground for rats and other pests.
So rejoice, hamsters and rangers everywhere <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" />