OK dang, someone is obviously in my head, b/c this is almost exactly how I wanted to rescape my 15!
tmmycat Profile - Your Tanks
I've got a second possibility in my head in case i can't find any driftwood that looks very tree-like.
*EDIT- OK, I see Ishar has already seen this tank in the past.... maybe I somehow telepathically stole the idea from him? lol.