View Volume
The region between the near-and-far clipping planes in clip space.
The view volume gives us our [see page 22, 3D screen space], a pyramid shaped structure which lets us easily clip pixels outside of it.
Note: We optimise the check for whether something is within the view frustum by using a box model rather than the actual pyramid shape.
Warn: We distort the box while rendering which causes a [see page 23, noticeable difference] between rendering something in view space and 3D screen space