Vikings lightbox. Vikings fans don't be upset with me over the purple we had to use, its what we had on hand that would transmit light through. If you have a darker purple that works well for lightboxes let us know.
Original example printed with Bambu basic PLA black, white, purple and gold (not silk gold).
Be sure to heat your hotend up to temp to clean any residual filament that may have been stuck to it from previous prints. This will help keep the color wisps down between layers so you'll have the cleanest print possible.
The back has a negative cube in it that you can move and scale to your needs for your light installation.
Enjoy and Happy Printing!