Here is a demonstration. I am using a very complicated and slow candy paint shader here. I intend to modulate the candy thickness with a Clouds node. It's a subtle variation and it's hard to see how the pattern works on the finished shader, so I temporarily switch to a Cycles Root where I've directly plugged the Clouds node in, and I've rendered it in FireFly. Since the active shader is just Clouds, it renders very fast.
Then I just switch the active root to the PoserSurface and without doing any rewiring, I activate the full shader (which is now over 75 nodes).
That's very nice BB
I've used yours several materials which I think you are developed with DreamlandModels,but those no longer works with SF