I thought some of you might find this free tool useful:
http://dryad.stanford.edu/index.phpThis is from their web site:
Quote:
Dryad lets you intuitively create beautiful trees for your virtual world or game. In Dryad, you create a tree by visually navigating to it through a design space: the space of all trees. This space has close to a hundred dimensions and Dryad lets you move around it as if it were a city map. To help you find your way, Dryads around the world communicate to share which trees were picked in the past. A collaborative mapping of the tree space emerges, which your Dryad uses to gently steer you towards high-quality finds. We call this collaborative design space exploration.
It's a little slow, but it seems to be pretty functional. I have not exported any of the trees to OBJ yet, but will try to test it out soon.
