This is an insert / organizer for On Mars: Alien Invasion. I split the components by chapter so you can just grab the tray(s) you need for the game mode you want to play. For Chapter 1, I split the components into three trays, one for the human players and two for the alien player. I split the alien player trays into a setup tray, which can go back in the box after setup, and an in-game tray, which can stay on the table during the game.
The insert supports sleeved cards. Pictured are Dragon Shield clear matte sleeves on the larger cards and Titanshield clear matte sleeves on the smaller cards. The insert fills the box, supports vertical storage, and has no lid lift.
To achieve the insert as shown, print one of each tray. The photos show how to layer all the trays, manuals, and alien board in the box.
I have included the original OpenSCAD files in case anyone wants to improve on the design.
The author marked this model as their own original creation.