I've finished the piece with the tree. It's based on this photo of a tree at the point where Goose Creek meets Chautauqua Lake in the Ashville area of New York. We love going there in the summer to rest and relax, if only for a day or two. Luckily we have family who live there every summer, so we always have a place to stay!
I'm now working on another Deep Space piece, but will return to the lake photos when I've finished this one, I think.