Reply To: Barrel Boolean
Well, it has absolutely nothing to do with:
normal and abnormal…
A Face Normal is a Vector perpendicular to that Face. Per definition in CG, this Vector is normalized, meaning has a length of 1.
But then there are still 2 possibilities.
The ‘plus’ and ‘minus’ direction of the Normals in CG is decided by the order in which the Vertices were created:
Deosil is red (bad) and Widdershins is blue (good).
It’s a bit more complicated, but this is the gist of it.