The Stylized Lines filter PxrStylizedLines  filter allows you to add linework to your Stylized rendering.  It can be used on its own for technical drawing looks or combined with toon and hatching for more creative looks.  You can even layer a number of PxrStylizedLine PxrStylizedLines filters on top of each other to create color, breakup, and width variation to emulate various traditional line work linework techniques.