Produced to aid in design of plastic products, VX CAD/CAM solution comes with network of ribs tool that accelerates task of adding stiffener/support ribs to 3D models. Users sketch 2D lines representing position and pitch of required ribs, and command automatically fleshes out sparse data to produce rib structure joined to model. Ribs can be resized or totally redefined; material thickness and draft allowance angle are user-controlled and may be adjusted at any time.