Hollow, sculpt and fine-tune your model
Open an STL, GLB or 3MF. Hollow it with walls as thick as you want and drain holes for resin, shape it with brushes, or remove or add triangles without losing its shape. The three tools work on the same model and, with the Pro, Max or Business plan, you download it exactly as it is.
Hollow
Make the part hollow inside with 0.8 to 10 mm walls: it uses much less filament or resin. With resin, open 1 to 6 drain holes of 2 to 10 mm at the lowest points of the part or where you click, so the resin inside can flow out.
You will see the material before and after, what you save in grams or millilitres and the hollow inside with the viewer's section. If the mesh is not a closed solid, it is hollowed anyway but without holes: repair it first in Repair model.
Sculpt
Six brushes to shape the part: inflate, deflate, smooth, flatten, pinch and grab. With their size in millimetres, their strength, X, Y or Z symmetry and undo and redo of the last 40 strokes. On a phone, one finger sculpts and two rotate.
Remove or add triangles
Remove the triangles you don't need, by percentage or an exact number, so the file is lighter and the slicer is faster: we tell you how far it moves from the original in millimetres. Or add more (×4, ×16 or ×64, up to 2 million), keeping the shape or smoothed, for detail when sculpting.
In your browser
Processed in this browser, with no credits. Up to 3 million triangles. You try it and save it to My projects on any plan; the STL downloads with the Pro, Max or Business plan.
More on usi3d
- Repair an STL model and improve its finish: Repair your STL, GLB or 3MF in the browser: close planar holes, fix face orientation and smooth out the noise and steps of AI-made models.
- Split into parts: Upload your STL, 3MF or GLB, pick your printer and split it into parts that fit its bed, with numbered dowels that fit together.
- Save filament with AI: See how much filament your 3D model uses and what each trick (infill, walls, supports) and usi3d's AI save you. Download the 3MF with the settings.
- 3D print cost calculator: Open an STL in your browser and estimate filament, electricity, machine time and labor with your own figures.