Every time there's a birthday or an event of any kind where I need to buy a gift, I'm always faced with the same problem.. Since I bought a 3D printer, I always think that the best gift would be something personalized that I would 3D print, something that cannot be bought elsewhere and something that would make me proud to show off my printer's creations! And also, I wouldn't have to keep worrying about finding a good gift idea! The most personalized item I could 3D print was a lithophane! What is a lithophane? To put it simply, it's a 3D print of a photo which uses the thickness of the print to show varying shades of grey when illuminated from behind.