How to 3D Print a Photo (Lithophane Recipe)
A 3D-printed photo — a lithophane — is the oldest trick in the printing hobby and still the one that gets the best reaction: a plain white panel that, held to a lamp, becomes a photograph. The physics is simple (thin plastic passes light, thick blocks it) and the recipe is short, but a handful of choices decide whether you get a gift or a washed-out gray rectangle. Here is the whole thing, from photo choice to lighting.
Quick answer: To 3D print a photo as a lithophane: convert the photo into a relief mesh (the lithophane maker on this site does this in one upload), print it in white PLA at 2-4mm total thickness with 0.1-0.16mm layers, and hold it against a window or backlight. Print an 80mm test before scaling up.
The recipe, all of it on one screen
| Setting | Recipe | Why |
|---|---|---|
| Filament | White / natural / light gray PLA | Thickness does the image; color only tints |
| Total thickness | 2-4mm (bright areas ~0.6-1mm) | Too thin breaks, too thick blocks the light |
| Layer height | 0.1-0.16mm | Layers form the gray levels — finer = smoother image |
| Orientation | Vertical (standing), or flat per your test | Vertical gives the most definition; test both |
| Perimeters | 3-5 | Ensures light-blocking walls are solid |
| Speed | Slow outer wall (40-60mm/s) | Fast walls leave gaps that leak light |
| Light | Backlight / window / LED panel | Reflected light will not reveal it — must come through |
Choosing the photo
High contrast and clear lighting win: faces at golden-hour light, pets with visible eyes, skylines at dusk. Low-contrast photos (overcast landscapes, washed-out flash photos) print as fuzzy gray — the thickness range cannot stretch further than the image itself. Crop close to the subject: a lithophane shows faces beautifully and crowds poorly. And pick meaning over aesthetics — this is the format people cry at, and it is not because the histogram was good.
How the image becomes thickness
The conversion assigns each pixel a height: bright pixels become thin plastic, dark pixels thick. Printed and backlit, the pattern of thin-and-thick filters light exactly like the original image's brightness pattern — and your eye reassembles the photo. The relief approach on this site models the subject slightly raised from the panel, so the print reads as a small sculpture in daylight and as the photo under light. Both readings are the point: it is the rare print that changes what it is depending on how you hold it.
Printing it: the two failure modes
- Washed out and gloomy — usually too thick (more than 4mm) or dark filament; thin it and go white
- Band of light leaking at the base or edges — wall speed too high or too few perimeters; slow the outer wall and add perimeters
- Curling on tall thin panels — add a brim; tall lithophanes flex their base
- Muddy detail — layers are the gray scale; drop from 0.2mm to 0.12mm and repaint the whole image finer
Framing and lighting your print
The print is half the object; the light is the other half. Windows work free (tape or lean the panel in daylight), a $5 LED puck behind it turns it into a night light, and a small picture-light frame makes it furniture instead of a toy. Warm-white LEDs flatter skin tones; cool-white favors landscapes. One practical note: e-ink-like glare is not a thing here — more light equals more image, up to the brightness of your source.
Variants worth trying once you have one done
- Curved panels — bend the mesh slightly for a lamp-shade arc
- Cylinder lamps — lithophane panels around an LED candle are the classic upgrade
- Keychain minis — 40-50mm panels make the smallest possible gift
- Multi-panel diptychs — two panels from one wide photo, framed together
What this site doesn't do
- We do not promise specific print results — your printer, filament and light are variables we cannot see.
- We do not claim lithophane prints show color — they show light through thickness, in white.
- We do not advise printing photos of people without their consent — the likeness rules on our policy page apply here too.
Frequently Asked Questions
Can any printer make a lithophane?
How big can I print a lithophane?
Why does my print look gray even in daylight?
Do I need the AI at all — can I just heightmap a photo?
More tools used in this guide
Turn a photo into a lithophane: a 3D-printed panel that reveals the image when backlit. AI builds the relief, you download the STL and print it thin. 2 free models a day.
Upload a JPG photo and get an STL model of its subject — AI builds the mesh, the page previews it in 3D, and the download is slicer-ready. 2 free models a day.
More guides
The full path from a photo or PNG to a printable STL: what the AI model actually does, what to check in your slicer, and the settings that matter.