Upload & Sell: Off
Very nice... almost perfect, I just wish all the lines where parallell with the edges, maybe a bit of perspective adjustment could fix that.
Regarding the lines not being perfectly parallel, that's because the building is actually angled from the point of orientation. In other words, from my position with the camera this point in the wall is slightly angled in (downward, from left-to-right) where it meets another wall just right of the concrete "seam" at the right of the image (that wall then angling, in frame, upward from left-to-right).
I did some paralax correction, since my perspective was shooting upward from essentially the bottom of what's visible here to about 10' above the roofline. I suppose I could have also done some perspective tweaking to force the lines parallel, as that'd probably be less visually distracting, but as-is pretty much represents the lines as they actually are.
And, as mentioned in the reply above, I considered leaving the band of sky above the building in the image. Not only would this give a sense of scale, but it better defines the angled perspective (i.e., why the lines aren't parallel to the framing of the image).