Bright pixels → thin walls
Light areas in your photo become the thinnest sections of the panel, allowing maximum light transmission.
STL Buddy Lithophane Generator
Lithophane Maker: Convert Photos to 3D Printable Lithophanes | STL Buddy
Turn any photo into a glowing 3D lithophane. Our free lithophane maker converts images into grayscale STL files — upload a JPG or PNG, download a printable mesh, and backlight it for stunning lit 3D prints.
Create Your Lithophane STL
Upload any photo to generate a 3D lithophane model. Works best with high-contrast portraits, pets, and landscapes. No account required to preview — sign in to download your STL.
Drag & Drop your photo here
or click to choose a file — JPG, PNG up to 10MB
What Is a Lithophane and How Does Light Reveal the Image?
A lithophane is a thin, sculpted panel where image brightness maps to plastic thickness. When you shine light through from behind, thicker sections block more light (dark tones) and thinner sections glow (bright tones). The result is a photograph that appears only when illuminated — a technique dating back to 19th-century porcelain, now accessible through 3D printing.
Dark pixels → thick walls
Shadow and dark tones become thicker plastic that blocks light, creating the dark areas of the revealed image.
Backlight reveals all
Without backlighting, a lithophane looks like plain white plastic. An LED strip, lamp, or window light brings the image to life.
Lithophane vs. Standard 3D Prints
Lithophanes use a fundamentally different design approach than typical 3D models. Understanding the difference helps you choose the right project type and slicer settings.
| Feature | Lithophane | Standard 3D Print |
|---|---|---|
| Image source | 2D photo brightness → wall thickness | 3D CAD model or scanned geometry |
| Visible detail | Only when backlit | Visible from all angles under normal light |
| Infill | 100% solid for even light diffusion | Typically 10–20% to save material |
| Best filament | White PLA or white resin | Any color or material for the application |
| Print orientation | Vertical (on edge) for best resolution | Optimized per model geometry |
How to Prepare Photos for Lithophane Conversion
Image quality before conversion has the biggest impact on your finished lithophane. Apply these resolution, contrast, and color optimization tips before uploading to the photo to STL converter.
Resolution: 1000+ pixels on the long edge
Higher pixel count gives the converter more data for facial features, fur texture, and fine details in the final lithophane.
Boost contrast before uploading
Darken shadows and brighten highlights in any photo editor. Lithophanes rely on brightness-to-thickness mapping — flat images produce muddy results.
Convert to grayscale mentally
Lithophanes are monochrome by nature. Color information is discarded during conversion. Choose photos with strong light-and-shadow separation rather than vivid color contrast.
Crop to the subject
Remove empty background so detail concentrates on what you want visible when lit. Tight crops also reduce print time and filament use.
Avoid heavy JPEG compression
Blocky compression artifacts translate to bumpy surfaces in the STL mesh. Use the original, highest-quality file whenever possible.
Lithophane Generation Process and STL Parameter Settings
STL Buddy's lithophane generator reads your photo's grayscale values and extrudes them into a watertight STL mesh. Here is the workflow and the key parameters that control how your lithophane looks when lit.
- Step 1
Upload your prepared photo
Drag a JPG or PNG into the generator above. The tool accepts images up to 10 MB.
- Step 2
Generate the lithophane mesh
The converter maps pixel brightness to wall thickness and outputs a watertight STL file ready for your slicer.
- Step 3
Download and slice
Import the STL into Cura, PrusaSlicer, or Bambu Studio. Set 100% infill, 0.12 mm layers, and vertical orientation.
Key STL Thickness Parameters
| Parameter | Recommended range | Notes |
|---|---|---|
| Minimum thickness (dark areas) | 0.4–0.8 mm | Thinnest sections let the most light through |
| Maximum thickness (bright areas) | 2.5–4.0 mm | Thicker sections block light for dark tones |
| Overall panel size | 80–150 mm wide | Common sizes for night lights and frames |
| Base/frame border | 3–5 mm flat rim | Optional flat border for mounting in a frame |
Optimal Wall Thickness for Light Diffusion
The thickness range between your lightest and darkest tones determines lithophane contrast. Too narrow a range washes out the image; too wide can make thin sections fragile or hard to print.
FDM (white PLA)
Minimum thickness: 0.6–0.8 mm (2–3 layers at 0.2 mm). Maximum thickness: 3.0–4.0 mm. A 3 mm total range works well for night-light-sized panels (80–120 mm wide). Use 100% infill so internal structure does not create uneven light spots.
Resin (SLA / MSLA)
Minimum thickness: 0.4–0.6 mm — resin achieves finer detail at thinner walls. Maximum thickness: 2.0–3.0 mm. Overall panels can be thinner than FDM equivalents while retaining sharp detail. Print vertically with light supports on the base edge only.
3D Printer Settings for Lithophane Printing
Correct slicer settings make the difference between a crisp, glowing lithophane and a muddy slab of plastic. Use these starting points for FDM and resin workflows.
FDM Settings (PLA)
| Setting | Value | Why |
|---|---|---|
| Layer height | 0.12–0.16 mm | Finer layers improve image detail on the Z axis |
| Infill | 100% | Solid infill ensures consistent light diffusion |
| Perimeters / walls | 1–2 | Single-wall printing maximizes thickness variation |
| Orientation | Vertical (on edge) | Best resolution; layer lines align with image detail |
| Filament | White PLA | Optimal light diffusion and contrast |
| Speed | 30–50 mm/s | Slower speeds reduce artifacts on thin walls |
Resin Settings (SLA / MSLA)
| Setting | Value | Why |
|---|---|---|
| Layer height | 0.05 mm | Resin excels at fine lithophane detail |
| Exposure time | Follow resin profile | Thin walls need precise curing to avoid blow-through |
| Orientation | Vertical with supports on base | Minimizes support marks on the visible face |
| Material | White or natural resin | Same light-diffusion principle as white PLA |
New to 3D printing? Read our beginner's guide or see best 3D printers for beginners .
Finishing and Lighting Techniques
Post-processing
- Remove brim carefully with a sharp knife — avoid scratching the visible face.
- Lightly sand the back surface flat if the print bed left texture.
- Do not paint the front face — paint blocks light transmission.
- Optionally spray the back with white primer to improve internal reflection.
Lighting options
- LED strip frame: Build a shadow-box frame with a warm white LED strip around the edges.
- Night light base: Use a commercial E12/E26 lamp socket with a diffuser plate.
- Window display: Mount the lithophane in a window — daylight acts as a natural backlight.
- Dimmer control: Add a dimmer switch to tune brightness for the best image contrast.
Design Tips for Best Lithophane Results
- Portraits with side lighting convert better than flat, evenly lit faces.
- Silhouettes and high-contrast pet photos produce striking lithophanes.
- Simple backgrounds beat busy scenes — clutter becomes visual noise when lit.
- Test at 50–75 mm width before committing to a full-size print.
- Add a flat border in your slicer or frame design for easy mounting.
- Warm white LEDs (2700–3000 K) give a cozy night-light feel; cool white (5000 K+) shows sharper detail.
Common Issues and Troubleshooting
Image looks washed out when lit
Cause: Light source too bright, or thickness range too narrow.
Fix: Dim the LED, increase max thickness in settings, or re-edit the photo for higher contrast.
Image is too dark overall
Cause: Low-contrast source photo or colored filament.
Fix: Boost contrast before upload. Switch to white PLA. Verify min thickness is below 1 mm.
Visible layer lines in the image
Cause: Layer height too coarse or printed flat instead of vertically.
Fix: Reprint at 0.12 mm layers in vertical orientation.
Warping or curling during print
Cause: Large flat lithophanes without brim, or drafty print area.
Fix: Add a 5–10 mm brim. Use an enclosure. Print smaller test pieces first.
Bumpy or noisy surface texture
Cause: JPEG compression artifacts or noisy source image.
Fix: Use a higher-quality source file. Apply slight blur or noise reduction before upload.
Gallery of Example Lithophanes
See how different photos transform into beautiful backlit lithophanes — from portraits and pets to landscapes and gifts.
Portrait Lithophane
Source: Family photo
Pet Lithophane
Source: Pet photo
Landscape Lithophane
Source: Landscape photo
Custom Gift Lithophane
Source: Wedding photo
Related STL Buddy Tools
Photo to STL
Convert any picture into a 3D relief for printing.
JPG to STL Converter
Upload a .jpg photo and download a printable STL file.
JPG to STL Photo Guide
Step-by-step guide for turning portrait photos into STL files.
Lithophane Maker
Alternative lithophane tool page with quick upload workflow.
Lithophane Maker FAQ
Common questions about creating 3D printable lithophanes from photos.
Ready to Create Your Lithophane?
Upload a photo to STL Buddy's free lithophane generator and download a 3D-printable STL in minutes. Turn your favorite images into glowing gifts, night lights, and wall art.