Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:3416085.

This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/4HolD5ByBIY

Corner blocks are recessed 7 mm to insert a lithophane

Intent is to put LED lighting strip around the side inside the box and behind the lithophane.

20% grid infill .2 Layer Height Supports touching build plate