The lithophane is the classic 3D printed photo gift, and it earns its reputation: a white plate that turns into a photograph when you hold it against a window is a small piece of magic. It is also, in our experience, the 3D printed gift most likely to end up in a drawer, because the magic needs a lamp behind it and most shelves do not have one.
A photo puzzle solves the lighting problem by printing the tones in real filament colours, front-lit, and adds a second life as a game. It costs more print time and needs four spools instead of one. Neither is better; they are for different people. Here is how we decide.
Pick a lithophane when
- The recipient has a spot with light behind it: a window sill, a lamp, a nightlight. A lithophane with an LED base is a complete gift.
- The photo has fine detail that matters: a baby's face, a text, a landscape. A lithophane resolves more detail than four tones can.
- You have one spool of white and an evening. Lithophanes print in a single colour and need no colour changes.
- The gift is for an adult who will display it, not handle it.
Pick a photo puzzle when
- The gift will be opened in a room, not next to a window. Puzzles read in normal light, like a print.
- Colour is part of the memory: a red dress, a green parrot, the team's colours. A puzzle prints real filament colours; a lithophane is white.
- The recipient is a child, a grandparent, or a family that opens gifts together. Assembling the picture is the activity; the result goes in the frame with a stand afterwards.
- You want it to survive handling. Puzzle pieces are 2 to 3 mm solid plastic; a lithophane is thin and cracks when dropped.
Side by side
| Lithophane | Photo puzzle | |
|---|---|---|
| Light | Needs a backlight | Any room light |
| Colour | White only (or a colour tint) | Up to 8 real filament colours |
| Detail | High, photographic | 4 to 8 tones, poster-like |
| Print time (150 mm) | ~3 h, one colour | ~4 h plus 2 h for the frame |
| Filament | One white spool | Four spools, ~25 g |
| Durability | Thin, fragile | Solid pieces, survives kids |
| Activity | None | Assembling, reassembling, reprinting a lost piece |
Or both
For the same photo, print the lithophane for the window and the puzzle for the table. They use different printers' strengths and the recipient gets the detail and the colour. The puzzle generator at tanskylab.com is free for two generations a month, which covers a test and the gift; for the lithophane, any of the free online generators does a fine job. The longer technical comparison covers HueForge as well, if you want the third option.