Very nice effect, but the shadows on the vines are too dark in comparison to the rest of the image. They are almost black compared to the shadows of the bricks they are attached to. If you lighten them just a bit, they will look a bit more realistic.

Very good idea for use of the source. In hi-res there are a few obvious straight crop lines, otherwise well done!

Will get out the toolkit and see what happens. Thanks guys.
Edit: Cleaned up those crops. Wow that was sloppy for me. Also adjusted the vine shadow with bevel settings and shadow layer too.

At first I was thinking someone uploaded a photo to the wrong contest, but wow, was I wrong, how cool is this creation, well done.

Very clever use of source!