things to be aware when mapping your specular channels

1) Mapping the eccentricity channel will control the glossiness of the specular setting ie good for sharp hilites on lipstick or greasy skin etc

2)The Roll off is basically the spread overall

the above maps should be grayscale images

3)Specular color....says it all really (this map should be a desaturated map with a color tone in the hilited areas ie: skin would have a bluish sheen)

4)reflected color, this can be mapped with a grey image to keep the tone of reflections to a minimum or again you can do something similar like the spec color map


Cheers
Jay