Another design from my daughter, This one features music. I used http://3dp.rocks/lithophane again, with the image shown, but this time I used a new feature that produces the single shell STL in one step. (Form: "360 solid shell") Printed at .0.3mm layer height 0 roof, 0 floor, 0 fill, no support, no raft, 2 shells. It took 3 hours to print.