Create Nurbs cut pyramid.
Define the bottom rectangle of the cut pyramid by clicking two points on a View window.
Define the top rectangle point by clicking two more points on a View window.
The Cut Pyramid tool has the following options:
Define - How the cut pyramid is defined, either by two corners or center and corner.
Order - Order of the NURBS surface.
Filled - If not checked the top and bottom face of the cut pyramid are not created.
Center - If checked, the top will be centered over the bottom.