Yep, those are not round, it is pointy.
I don't even know what is the name for that kinda shape. Kinda like big fat octagon star.

Cobweb would look much like cobweb when it curve inward, not outward like a round shape. Nature is organic/irregular, so less systematic could be nicer too. By the way, we do have a spider web hair pin in menewsha, that is one good thing to look at.