I am struggling to decide what I think about the small triangular shadow at top right. If the rest of the picture was symmetrical I would think it did not belong. But the asymmetry created by the shadows of the vertical decoration and door framing make me think it fits.
Can't say that it bothers me too much but a crop from the top to eliminate the top railing (and shadow) can also work. Obsidian Aqua is a dev. that I have never heard of...sounds exotic!