Editing Hidden-surface determination (section)

=== Viewing-frustum culling ===
The [[viewing frustum]] is a geometric representation of the volume visible to the [[virtual camera]]. Naturally, objects outside this volume will not be visible in the final image, so they are discarded. Often, objects lie on the boundary of the viewing frustum. These objects are cut into pieces along this boundary in a process called [[Clipping (computer graphics)|clipping]], and the pieces that lie outside the frustum are discarded as there is no place to draw them.