I've been using the cartoon shader in Poser too...with a little bit of tweaking, you can usually pull off a nice multi-layered effect. (IE: Render a backdrop in Cinema or whatever you use with the toon shader, then your character in Poser, any foreground elements in Cinema, and then layer them all together in Photoshop or After Effects/Final Cut.) I like doing it this way because I can draw in light effects with Photoshop and get a cel on top of backdrop look. It's the long way around, but so far seems to work.