(Hummm, neat idea, but uncertain on photos wrapping around the corner. The frames could meet up on the edge, but think the frames still might be best if they met in the corner but that each wall had its own photo frame.
The upward angle of the frames should match the angle of the stairs in a staircase display. Keep larger frames as the focal point and use smaller ones as an accent – note how the corners of the smaller frames are placed in relation to the dotted line
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