And to make it easier to set and see how those Map Range Nodes work below is the next Freebie once I get it finished.

The Scope Ranges Node sends out a test/control signal that you inject into the shader and then it measures the signal coming off the shader.  Much like an Oscilloscope you find on electronic test benches  

Poser 5, 6, 7, 8, Poser Pro 9 (2012), 10 (2014), 11, 12, 13