A performance optimisation in rendering in which if a [[Triangle]] is [[02 Areas/Computer Science/Triangle Orientation|Facing]] away from the camera. For some triangle $\triangle PQR$ with an [[Triangle Orientation|Orientation Vector]] $\vec n$ and some camera at position $\vec c$ , the triangle is culled (skipped) from rendering if for all vertices $v$ of $\triangle PQR$ $(v - \vec c) \cdot \vec n \leq 0$. ![[../../00 Asset Bank/Pasted image 20250910171646.png]]