Mario Question Box

It's the question-mark box from Super Mario Brothers! Put your coins in it. Hide a mushroom or fireball (the candy of that name, obviously) in it.

The other day, I thought I'd design a 3D-printed box. This wouldn't be just any old box, but the question-mark block from Super Mario Brothers. I started to break down what would be involved in the design. I would have to come up with the base box template, then virtually punch out a grid of dots representing the correct pixels. But, I thought, i