I'd like to show how it's looking from this angle. Do you see the pencil lines on the backdrop near the center of the photo? They are the extensions of the rails on the rear two tracks. There should be four more for the front tracks. Anyway, the idea is that they converge to a point which is hidden from view by branches of a tree near the corner of the wall. I originally was going to ask my wife to paint the extensions of the tracks on the backdrop, she is an artist and capable of doing so. When she came down to look at the scene, she asked why the lines wnt uphill. I said waddya mean uphill? When I crouched down to look from her eyelevel, the rails sure were going uphill! None to surprisingly, they also go downhill when I stand on my toes. So, I think I will instead use the lines as a guide for a foreground horizon, and put another, distant, horizon a bit above it. The distant horizon should make it look like a valley beyond the corridor tracks. Not much of an attempt to detail it, I think it may be better left plain and let everything else attract the eye. Any opinions?