Hi David,
wrt the small size, I was implying the difference between a postcard sized image, and a wall sized one. The steps/shadow comment was genuine, something like the 3d images that flip, Escher drawings, whatever. Now it is seen by me, it will not flip back the other way. I understand your views re industrial art. But, if you adjust colours, lighting, select the view to make it look nice, why not remove or add artefacts to make it 'look better'? Why have straight edges to the image anyway, it's not a question that canvas has to be stretched, if the objective is to show images on the web?
Put it another way, if I had seen the image with the line removed, i.e. the wall panel whatever was larger, then I think I would not have said - 'I think it needs a horizontal line across the whole image, it can't be real because they do not make panels that size'.
There is the art of the builder, the guy who put the light there, the steelworker, etc. Then there is your art, how do you show this wonder of creation? In the same way as the steel worker is allowed to bend the tubes, weld stuff together, then you are allowed to work on what he does. If you do not, then it is your choice, no problems, but the result is then tending more towards product photography.
Best wishes
Ray