Polymend

Guides

Short guides to the problems that stop a 3D model from printing, and how to fix each one with Polymend.

• How to fix an STL file for 3D printing: How to repair a broken STL file for free in your browser: what the slicer warnings mean, how to fix holes, non-manifold edges and reversed faces, and what to do when a quick fix is not enough.
• Convert GLB to STL for 3D printing: How to convert a GLB file to an STL or 3MF you can print, free and in your browser: turn it upright, set its height in millimeters and fix the mesh faults slicers flag.
• How to fix non-manifold edges in an STL: What non-manifold edges and open edges are, why a slicer warns about them, and how to fix them in an STL or GLB file for free in your browser.
• Fix the open edges warning in Bambu Studio: Why Bambu Studio warns about open edges, non-manifold edges and reversed faces when you import a model, and how to fix the file for free so it imports without the warning.