This is what passes for a piece of art in our home, and I am hesitant to take it outside for a pane-free shadow photo (it's sitting on an ottoman here). I will consider alternatives but of course am also at the mercy of Mother Nature providing abundant sunshine. I did try to merge the shadow of the tree's trunk with that of muntin.
I think that Dave felt a shadow was necessary...though of course as I Look at this again, the tree itself throws a pretty distinct shadow. Not a criticism, just a thought...(also Dave may not have had enough clear space to place the tree without the window shadow). Best Wishes, Traveller