Hey guys. I printed a box with the design centered in it. Then filled epoxy resin that I colored black. I also made one with orange resin that I wasn't happy with and am planning to turn back down to the tube and try again.
That's actually pretty darn clever. You 3d printed your mold with built in embedments. Assuming print times are reasonably low and consuming the mold each time is cost sustainable, that is a really great idea.