# Drawing to 3D model from sketch to figure

> Photograph a drawing, a doodle or your kid's monster and turn it into a 3D model you can print. The AI fills in the depth the paper never had.

Page: https://printpal.io/convert/drawing-to-3d-model
Updated: 2026-11-12
Try it: https://printpal.io/convert/drawing-to-3d-model (upload an image; the free plan needs an account)

Drawings are harder than photos for image-to-3D, because there is no lighting to read depth from: a line drawing is only outlines. The AI leans on what it knows about the subject, a dog, a robot, a dragon, to give it volume, which is why recognizable subjects convert better than abstract doodles.

Two things help a lot: color the drawing in with solid fills, and draw the subject from a slight angle rather than perfectly flat-on. If the first result drifts from the drawing, generate again or step up to Refined quality; on Pro, AI edits let you say "make the ears bigger" instead of starting over.

## How to turn a drawing into a 3D model

1. **Photograph or scan the drawing.** Flat and square to the camera, in even light, with no shadow from your phone.
2. **Upload it and sign in.** Free account; the drawing comes with you.
3. **Generate.** Try two or three times; each run interprets the drawing a little differently.
4. **Print it.** Download STL, scale it to 60 to 100 mm and add a base if it needs to stand.

## Things to know

- **Shoot it flat:** Hold the phone parallel to the paper so the drawing is not keystoned, and crop to the drawing.
- **Fill with color:** Solid colored areas give the AI shapes to work with. Pencil outlines alone come out vaguer.
- **Thicken thin parts:** Stick legs and thin tails break when printed. Draw them chunkier, or thicken them in the model.
- **Plan a base:** Figures from drawings often lean. On Pro, ask the AI to "add a round base", or glue the print to a coin.

## Same model, every format (measured)

Same 998,810-triangle knight exported with trimesh; the GLB is the download as it came from PrintPal. The 3MF holds geometry only; a painted multi-color 3MF adds a little for the color data.

| Format | File size | Color | Units | Typical use |
|---|---|---|---|---|
| STL (binary) | 49.9 MB | No | None (slicers assume mm) | Any slicer |
| STL (ASCII) | 303 MB | No | None | Legacy CAD; avoid |
| OBJ + MTL + texture | 84.9 MB | Texture or vertex colors | None | Blender, sculpting |
| GLB (with textures) | 40.5 MB | Yes, PBR textures | Metres | Web, AR, games |
| 3MF (zipped) | 21.0 MB | Yes, per triangle | Millimetres | Bambu Studio, OrcaSlicer, PrusaSlicer |
| PLY (binary) | 27.3 MB | Vertex colors | None | Scans, point clouds |

## Real example

The mushroom house model shown on the page was generated by PrintPal from cottage.png (1024 px). Raw output: 998,594 triangles, one watertight body with consistent winding. Web preview: 59,910 triangles, 365 KB GLB.

## FAQ

### Can I turn my child's drawing into a 3D print?

Yes, and it is one of the most popular uses. Color it in, photograph it flat, generate a couple of versions, and print the one that looks most like the drawing.

### Does it work with pencil sketches?

Yes, but shaded or colored sketches work better than bare outlines, because shading is what the AI reads as depth.

### Will the model look exactly like the drawing?

It follows the drawing's shapes and colors, but the AI interprets the depth and fills in the back, so expect a 3D version of the idea rather than a perfect copy.

### Can I use concept art or character sheets?

Yes. Crop to a single pose, ideally a 3/4 view, rather than uploading a whole sheet.

### Is it free?

Yes: 10 generations a month on the Free plan with STL and OBJ downloads.

### How long does a conversion take?

Draft quality usually finishes in 30 to 60 seconds. Refined and Production take longer because they build more detail, and Pro generations run on a priority queue.

### Can I sell prints of the models I make?

Yes, on Pro and Studio, which include commercial rights for prints and digital files. The Free plan is for personal use. You also need the rights to the image you upload, so stick to your own photos and artwork or images you have permission to use.

## Related conversions

- [JPG to STL](https://printpal.io/convert/jpg-to-stl): Convert a JPG or JPEG photo into a print-ready STL with AI. Builds the full 3D shape from one photo and repairs the mesh. Works with phone photos. Free plan.
- [JPG to OBJ](https://printpal.io/convert/jpg-to-obj): Convert a JPG photo into an OBJ 3D model with AI. One photo, no photogrammetry rig. Opens in Blender, Maya and every slicer. OBJ export on the free plan.
- [JPG to GLB](https://printpal.io/convert/jpg-to-glb): Convert a JPG photo into a textured GLB 3D model with AI. One file with mesh and textures for AR, web viewers, Blender and game engines.
- [JPG to 3MF](https://printpal.io/convert/jpg-to-3mf): Convert a JPG photo into a 3MF for Bambu Studio or OrcaSlicer. AI rebuilds the object in 3D and reduces its colors to the 2 to 8 filaments you own.
- [JPG to 3D model](https://printpal.io/convert/jpg-to-3d-model): Convert a JPG or JPEG photo into a 3D model with AI. Download STL for printing, OBJ for Blender, GLB for web and AR, or 3MF for color prints.
- [PNG to STL](https://printpal.io/convert/png-to-stl): Convert a PNG into a watertight, print-ready STL with AI. Real 3D depth instead of a flat extrusion, transparent backgrounds supported. Free plan.
- [PNG to OBJ](https://printpal.io/convert/png-to-obj): Convert a PNG into an OBJ 3D model with AI: real volume, not a textured flat plane. Open it in Blender, Maya or any slicer. OBJ export on the free plan.
- [PNG to GLB](https://printpal.io/convert/png-to-glb): Convert a PNG into a full-color GLB (binary glTF) 3D model with AI. Transparent PNGs become clean textured meshes for web, AR, Blender and game engines.

## Learn more

- [Image-to-3D best practices](https://printpal.io/wiki/image-to-3d-best-practices): What makes a source image convert well, with examples.
- [Iterating on AI 3D models](https://printpal.io/wiki/iterating-on-ai-3d-models): How to get from a first draft to a model worth printing.
- [Supports guide](https://printpal.io/wiki/supports-guide): When to use tree vs normal supports, and how to remove them cleanly.

- All image to 3D conversions: https://printpal.io/image-to-3d
- PrintPal for LLMs: https://printpal.io/llms.txt