How are my files checked when being uploaded?

We check the uploaded files for printability. Our software checks a few criteria, and it might fail for these reasons:

1. Presence of degenerated faces
2. Presence of duplicated faces
3. Mesh is not manifold
4. The normals are not consistent
5. The volume is less than 0
6. Some faces are intersecting each other

You can check what is wrong with your mesh using this little online tool.

Learn more about the File approval process >