Fixing a model that will not unfold well.
Holes, flipped faces, loose shells and dense sculpts, and what to do about each one.
Why did my model unfold into hundreds of tiny pieces?
The mesh has far more triangles than a paper build needs. Reduce it to a few thousand triangles and the pieces get bigger and fewer.
Dense meshes are simplified automatically, but a decimation you control in your modeling tool always beats an automatic one, because you decide which details survive.
Why does my model look inside out?
Its faces point the wrong way. In your modeling tool, recalculate or flip the normals so they all face outward, then export again.
Models exported from scanners and from older STL tools often have inconsistent winding. The studio corrects the obvious cases on load, but a model with truly mixed normals should be fixed at the source.
Do holes in the mesh matter?
Yes. A watertight, manifold model unfolds most predictably. Holes and edges shared by more than two faces produce odd seams and stray pieces.
Most modeling programs have a mesh repair or close holes function. Free tools like Blender and Meshmixer both do this well.
What about parts that float or intersect?
Separate shells are unfolded as separate parts, which is fine, but overlapping solids that were never merged make confusing paper shapes. Boolean union them first.
Should I remove interior geometry?
Yes. Anything inside the model is invisible in the finished build but still costs triangles, pieces and paper. Delete it before exporting.
Try it with your own model
Nothing to install. Drop in a model and see your first template in seconds.
Open the studioKeep reading
- Which file formats can I use?Accepted inputs, exports, ZIP bundles for textures, and converting unsupported files.
- Something is not workingFile will not load, wrong print size, red pieces, too many sheets, slow browser.
- Editing pieces, edges and the sheet layoutCut and rejoin edges, move and rotate pieces, split, merge, repack and undo.