not really, we just need enough variation. one or two trees isnt enough to make it look good.
variations include height, branch shape, trunk shape, trunk width, exposed root width, leaf count, leaf distribution, and branch number. basically build a new tree each time, but have it the same style.
however we're sticking with non-round using trees, like the one on the mountain, so nurgle's isnt a good example.
could you build some prop trees by yourself since you can't seem to join while I'm hosting, then pm me the save?