Made this as a Valentine's day gift.
Remixed the original source so I could add a 1 cm RGB LED strip. Result is a lithopane box with a remote controlled RGB LED strip.
Lithopanes were made by http://3dp.rocks/lithophane/
Be sure to check out RCLifeOn tutorial on how to correctly print a negative lithopane https://youtu.be/y63sVpeViXo
Added a filled top for those who would use only 4 lithopanes.
Fully assembled project: https://youtu.be/xn145lzwPwg
100% in lithopanes, 15% in any other part
Printed everything using a heated bed at 65 celsius and nozzle at 210 celsius.