ClippedPlaneSurfaces apply the logical AND of all their contained
IBoundsClippers to the underlying
PlaneSurface. Because
IBoundsClippers are axis-aligned in the space of the plane being clipped, this means all ClippedPlaneSurfaces will be rectangular subsections of the XY plane of the transform of the
PlaneSurface they clip. They are not necessarily centered on this transform, however.