I already did this once, successfully, unfortunately Blender crashed shortly afterward and my edit wasn't in the autosave file or my saved version so I am stuck with doing it again. The first time I had all the windows highlighted as shown, and when I filled them, they obliging filled with a nice flat face. Now it is filling from window to window through the inside of the structure which I do not want. Why is it doing this?


  • $\begingroup$ Are the normals pointing the right way? $\endgroup$
    – OXO
    Mar 17, 2020 at 7:33
  • $\begingroup$ This worked beautifully, thank you $\endgroup$
    – J L Lacy
    Mar 18, 2020 at 11:46

1 Answer 1


You need to use Vertex > New Face.
Shortcut: F

(while it has a similar name, Face > Fill is a different operation)

enter image description here


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