Raiders lightbox for any fans out there. It printed pretty easily with the face print time being a little over 2.5 hours with the settings we use.
The back could easily be sped up but when we make the file for the 3mf it keeps the face print settings which are slowed down, just adjust to what your printer/filament can handle to bring the time down for the back piece.
Colors used in the example pictures were
Kingroon gray PLA and Bambu basic PLA black and white.
As always heat up your nozzle and clean any old filament that is stuck to it before sending the file to print to prevent wisps as best as possible.
The back has a negative cube you can move and scale to your needs.
Enjoy and Happy Printing!