This is a mini diorama of an infinite library. The infinity effect is accomplished with a mirror on the back and a one-way glass mirror on the front. A standard LED is used to illuminate the scene, it is mounted into a socket which was designed in the ceiling for this purpose. All the parts should be printed in the corresponding colors, this way they don't have to be painted.

Back mirror size cca: 56 x 86 mm
Front mirror size cca: 62 x 73 mm

My mirrors were already this size when found, if you have the option, cut the mirrors to the exact size after printing.