I'm making solids with BRepOffsetAPI_MakePipeShell, and sometimes one face is not present.
I've tried to check the resulting shape, but BRepCheck_Analyzer reports that it is good, and it fuses with solids without problems. It has mass, which makes me think that the face is invisible - but I cannot select it when I enable face selection.
ShapeFix_Solid doesn't have an effect either.
What should I do?