Pen and ink material

I have started to have a play with the pen and ink feature in 3ds max. I had a little play with this last summer, but after finding the video below i have been thinking about how i could make my animation a little different by altering the way it looks.
It could work...but then again it could go tits up and go horrible wrong. Only time will tell i guess.

Here is the characters shown earlier but textured with pen and ink. I quite like the way it looks, but the rendering times seem to be quite long. This one frame taking just under 40seconds.