Hello Martin, first of all, thank you for your reply!
But I’m not sure I understand what you mean.
Why is it important for Blender (or I guess for 3D handling software) that every “face” respects a matemathical definition of a polygon? Because as we can see in my picture and yours, at least Blender allows us to do this kind of “not polygon” stuff without warning us about it.
And about the examples you gave me, I am not sure I would be able to distinguish between a “correct” polygon and a incorrect one. Is there some googling I can do to read more about all this stuff?
Thank you!
