How to make a lithophane from a photo
Pick a high-contrast photo, convert it to a 3D relief with a free lithophane generator, and print it in white PLA at 0.1 mm layers, 100 % infill. It looks like a plain grey plate until you put a light behind it — then the photo appears. The whole thing is one upload and an overnight print.
What a lithophane actually is
A lithophane is a thin translucent panel where the thickness carries the image. Where the photo is bright, the plastic is thin and lots of light passes through; where the photo is dark, the plastic is thick and blocks the light. Off, it looks like a featureless grey tile. Backlit, the picture snaps into view. The technique is 200 years old — it was done in porcelain — but a 3D printer makes it a ten-minute project instead of a craft you apprentice for.
Step 1: pick the right photo
Contrast beats resolution
The single biggest factor in how a lithophane turns out is the photo, not the printer. A lithophane only has brightness to work with — no color — so you want an image that already reads clearly in black and white:
- High contrast, clear subject. Portraits, pets, and landscapes with a bright sky are ideal. The subject should stand out from its background.
- Even, soft lighting. Harsh shadows print as solid black blobs; blown-out highlights print as flat, featureless thin spots.
- Avoid very dark or very busy photos. Night shots and cluttered scenes turn muddy once they become a relief.
A quick test: desaturate the photo on your phone. If it still reads well in grayscale, it will make a good lithophane.
Step 2: generate the lithophane
Upload and set the size
Drop the photo into the free Meshcast lithophane generator. It converts the image's brightness into a printable relief right in your browser — the file never leaves your device, and there's no signup. Set the panel size (a 100 mm tall flat panel is a good first print) and the thickness range, then download the STL or 3MF.
Thickness matters. A minimum of about 0.8 mm for the brightest areas and a maximum of about 3 mm for the darkest gives strong contrast while still letting light through. Too thin overall and it washes out; too thick and even the highlights stay dark.
Step 3: print settings that make or break it
White PLA, fine layers, solid infill
A lithophane lives or dies on print quality, because every layer line is visible when backlit. The settings below are the difference between a crisp portrait and a striped smudge:
| Setting | Use | Why |
|---|---|---|
| Filament | White or natural PLA | Diffuses light evenly. Skip silk, glitter and dark colors. |
| Layer height | 0.10–0.12 mm | Finer layers = more tonal detail in the image. |
| Infill | 100 % | Any gap shows as a shadow or bright patch when lit. |
| Top/bottom layers | 0 (no light gaps) | The relief itself is the whole wall; extra solid layers block light. |
| Orientation | Standing on its edge | Puts layer lines across the image for the finest vertical detail. |
| Speed | ~30–40 mm/s | Slower printing gives cleaner walls and fewer artifacts. |
Printing the panel vertically (standing up) takes longer and may need a brim or small supports, but it gives noticeably better detail than printing flat. If you just want a quick first result, flat-on-the-bed works too — you'll simply see the horizontal layer lines more.
Step 4: backlight and display
Any even light source
The magic only appears with a light behind it. Good options, cheapest first: a bright window, a slim LED light panel or tracing pad, an LED photo frame, or a small light box. Use an LED tea light rather than a real flame — PLA softens with heat. Warm white light usually flatters portraits; cool white looks better for architecture and snow scenes.
FAQ
What is a lithophane?
A lithophane is a thin translucent panel whose thickness varies with the brightness of an image. Thin areas let more light through and look bright; thick areas block light and look dark. It looks like a plain grey plate until you backlight it, and then the photo appears.
What print settings are best for a lithophane?
White or natural PLA, 0.10–0.12 mm layer height, 100 % infill, and no top or bottom light gaps so light passes evenly. Print slowly (around 30–40 mm/s). Standing the panel on its edge puts the layer lines across the image for the finest vertical detail.
Do lithophanes work with color photos?
Yes. The generator converts the image to brightness values, so a color photo prints as a monochrome relief. High-contrast portraits, pets and landscapes give the strongest result; very dark or low-contrast photos come out muddy.
What thickness should a lithophane be?
A minimum thickness around 0.8 mm for the brightest areas and a maximum around 3 mm for the darkest gives good contrast without blocking all the light. Meshcast lets you set both before you download.
How do I light a lithophane?
Any even, diffuse backlight works: an LED light panel, a slim light box, an LED photo frame, or a bright window. Use an LED tea light rather than a flame, and warm white light usually flatters portraits more than cool white.
Made by @meshminds3d. Got stuck? Email a photo and I'll help you debug.