The 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 PxrStylizedLines filters on top of each other to create color, breakup, and width variation to emulate various traditional linework techniques. 

Linework Tips

• To gain extra solidness to lines, try changing the Weight Type to Hermite or Double Sigmoid
• Add creative variety to your lines by breaking up and varying the width with a texture or pattern plugged into the Line Thickness input of your PxrStylizedControl node.
• Try experimenting with linework by layering up various PxrStylizedLines filters, each one with their own unique widths, colors, and thickness.