Advanced 3D Modeling The 3D Power Pack technology is fully integrated with VectorWorks to provide significantly expanded NURBS (Non Uniform Rational B-Splines) functionality. NURBS is a mathematical formulation that represents the geometry of curves, circles, arcs, and surfaces in 3D space. The 3D Power Pack provides the following features and benefits: Advanced solid modeling operations Advanced surface modeling operations Solid-surface interactions Participation of surfaces in Boolean operations Easy manipulation of surface geometry Simple 3D user interface For information on backwards compatibility with 3D Power Pack objects, see 3D Power Pack Compatibility.