Yeah. I found that out pretty quick. I managed to simulate the same idea of the blender shader with FF nodes but couldn't do it with Cycles. Color Ramp was too difficult to duplicate. Separate RGB did not respond like Shader to RGB. And there was no solidify feature that I could see to create an inverted hull. Just to name a few. But I used the Diffuse Node from FF along with several math nodes, manually creating an inverted hull and was able to cobble together something that worked similarly to the shader I was looking at. It's an ugly beast that I will have to wrap a Python script around to make efficient but I would have preferred the Cycles nodes having existed. Instead of a few minutes, it took hours to recreate. :( May Poser 12 will have some more Cycles nodes.