Attached Link: http://freestyle.sourceforge.net/doc/html/index.html

...Yes, it's NOT a "Slick" commercial program- more like a "working demo" and the developers are ACADEMICS who made FreeStyle just to illustrate their NPR workflow concepts...

I would recommend reading their Research Paper to better understand their NPR process- and also the Python PDF for anyone interested in programming their own NPR effects... but it is pretty easy to "HACK" their Style Sheets to modify them as you experiment with them-- which they ENCOURAGE people to do...

They are ALSO working to get FreeStyle working with Blender- so I would expect that ANYONE who has an interest in developing FreeStyle for a specific program- they would probably try to help them do it. Certainly it would be IDEAL for Daz Studio- being that it is Renderman based and a free program as well... Maybe someone could convert the Python scripts using the Daz Studio SDK-- seems like Daz Studio scripts could handle this...

"The freestyler's job is to write style modules. Each style module is a piece of style and it has to be written using the Python language. This document contains information about the operators and tools provided by Freestyle. Python documentation material can be found here: www.python.org. (the tutorial is a good start.)
The operators you are about to use simulate the drawing process: it is essential to have a clear idea of the data structures that are manipulated as well as of the pipelined organization of these operators. We therefore recommend to read the related research paper before starting. "