Watertight

The Shoe STL must be watertight: 

• no holes (naked edges)
• no non-manifold edges, 

Each mesh edge has to be adjacent to 2 faces, if less (1) is a naked-edge, if more (3+) is non-manifold edge.

When Rejected:

• Mesh contain holes
• Mesh contain duplicated vertices
• Mesh contain 3 or more faces connected to same edge. 
• Make sure weld vertices before export.

FEEDBACK STLs

Autocheck exports the mesh faces from the shoe that contain naked or non-manifold edges. 

• right_watertight_faces.stl
• left_watertight_faces.stl