I am trying to find a workable method for doing a good Sketchup-style ink line/architectural render in Zbrush, which draws clear outlines around subtools and polygroups (but is not a full wireframe render), and enables you to control the line properties (color and width). The ‘Posterize’ and toon-shader methods i currently know of are not adequate. Any help appreciated.
Not what you specified but maybe helpful.
http://www.zbrushcentral.com/showthread.php?183256-Anime-Material-Fire-Mage-(Toon)&highlight=Outline+material
http://www.zbrushcentral.com/showthread.php?5732-Comic-style-2d-Art-Question-Problem-for-the-group&highlight=Outline+material
http://www.zbrushcentral.com/showthread.php?3302-Vampire-Toonshader-and-a-Material-if-you-want-it&highlight=Outline+material
I’ll give this a try.