Hinged Painting

There is a piece of work in an old art school studio, propped against a pile of stuff, its a hinged painting, in the style of an alter piece. The tutor  said that the female undergraduate who made it lacked imagination but made up for it with precision but when I  looked closely I could see that the hinge wasn’t that good, when the picture closed there was a gap. Later I saw it hung up on the wall, quite high up. It had a gilt frame, it was displayed open, flat on the wall. I don’t recall the image, something like wallpaper, or no image at all, just bare board.