DESCRIPTION:

Eccet can cut away parts of the volume to allow for looking
at interesing areas without being obscured by other objects
in the foreground.

Cutplanes live in the global coordinate system and can be moved,
and redefined as the user wishes. They can be mapped to renderers
as the user wishes (only mapped cutplanes take effect) and most
renderers support restricting the use of specific cutplanes to
specific classes.