Insert for the board game Mascarade. This fits all the cards and reference sheets from the base game plus the expansion. You will have to remove the cardboard liner.
The wall and floors are 1.2mm thick, and so can be easily printed with 0.4mm or 0.6mm nozzles. A coarse layer height does not affect functionality. There is a small 45 degree chamfer where the outside surface meets the build place, this is to make sure that the insert fits well into the cardboard box; if you print with a brim, be aware of that feature when cleaning up the print.