Mitred Extrude Normals

Hi,

How can I recalculate the normals so that they show properly? I tried with convertToFlatShadedMesh(), but this gives an incorrect geometry where the edges of the rectangle dissapear, see below in red:

I tried to recalculate the normals but it didn’t help.

PG below, lines 139-148:

Just checking if anyone could offer some insight?

A more organized PG:

solved by: FlatShadedMesh missing edges? - #2 by Evgeni_Popov

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