This is a lightbox frame that holds 3d printed lithophane images horizontally or vertically. You can convert photos into lithophanes and then 3d print them. When these prints are lit from the back the images look very realistic, even when only white filament is used to make them.

(Horz. Lithosphane size: 150mm x 3mm x 112.5mm)

(Vert. Lithosphane size: 1112.5mm x 3mm x 150mm)