Turn an image into an STL file
STL is what a slicer wants: triangles, and nothing else. Two things about a generated mesh are worth knowing before it reaches the printer.
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01
Upload a photo of one object
Printing works best from a subject with real volume to it. A photograph of something flat gives a mesh that is technically correct and not worth the filament.
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02
Generate and export as STL
Pick the higher quality setting if the print is large. Detailed geometry costs more tokens and is the difference you will actually see at 100 mm.
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03
Scale and check it in the slicer
Import it, set the size you want, and run the repair pass your slicer already has. This is the step people skip and then blame the model for.
STL carries less than you might expect
No colour, no UVs, no materials, and no units. It is a list of triangles. That is the whole format, and it is why it has outlived every attempt to replace it · every slicer ever written can read one. If you want the texture too, export the GLB as well and keep it for reference.
About watertightness
A generated mesh is built to look right from the outside, not to be manifold. Most of what comes out here slices without complaint, but some of it has a hole or a self-intersection where the model had to guess at a surface it could not see. Every modern slicer repairs minor cases automatically. We would rather say this than let you find it out at layer 200.
About scale
STL has no notion of units, so a slicer assumes millimetres and a generated model arrives at an arbitrary size. Set the dimension you want on import rather than trusting what it comes in at. This is not specific to us · it is true of every STL that was not authored in a CAD package.
Tabletop and miniatures
A reference image into a printable figure, at a cost per attempt low enough to iterate on.
Replacement parts
Photograph the broken thing, print a stand-in. Bear in mind the mesh is a likeness rather than a measurement.
Props and cosplay
Scale it up, slice it into sections, print it over a week. Nothing about the export limits how large it can be.
Moulds and casting
A printed positive from a photograph is a shorter route to a mould than sculpting one.
Can I 3D print a model generated from a photo?
Yes, and STL is one of the export formats on every plan. Check it in your slicer first · a generated mesh is built to look right rather than to be watertight, and a slicer will tell you in seconds what a printer takes hours to.
Will the print be in colour?
Not from the STL · the format holds no colour at all. For a colour print, take the GLB or OBJ into a slicer that supports textured meshes, or paint the print afterwards.
What size will the model come out at?
Whatever you set on import. STL carries no units, so scale it in the slicer to the dimension you actually want.
Do I need to repair the mesh first?
Usually not. Cura, PrusaSlicer and Bambu Studio all repair small holes on import. For anything stubborn, the 3D-Print Toolbox in Blender or a dedicated mesh repairer will close it.