bill, it's very ingenious IMVHO.  I haven't seen this before.

one question - if the figure has got a poser 7.x toon shader applied to its body,
can your lens be adjusted so that it has the effect of adding an edge-blend node
over the toon shader? 

the reason I ask is that this might allow one to combine an edge blend (fall-off shader)
layer over the toon shader (sans lines) to get better-looking line work in poser, without
having to export the raw toon shader render and edge-blend renders to photoshop and
combining them there , with the edge-blend render as multiplying layer over said toon layer.