My mesh shows what looks like a bogus face normal. The mesh and screen cap show the problem. Some holes still show a face normal but no face can be selected!

I got to this point by creating a building mesh and merging vertices. I created a separate mesh (plane) for cutting holes in the building. I used knife project to put cut lines into the building. Then I selected and removed faces where holes should be. Some holes still show a face normal even though there is a hole (no face can be selected). Merging vertices does nothing.

This appears to be a problem, but I don't know if it causes anything bad.


  • 1
    $\begingroup$ I understand that the normal will show based on the median position of the face. This means you may have the normal 'coming out from a hole'. If you merged verticies (make sure you have the object selected) then also try Mesh > Clean up > Delete Loose $\endgroup$ – barkest Aug 15 '19 at 14:56

Barkest has the answer, I believe. The "bogus" faces have surrounding real faces whose medium centers just happen to be over a hole, giving the false impression that there is a face where a hole exists.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.