Apparently the paper on which the algorithm for the Scatter node is based included two different test readings for human skin.  As I understand it, the preset options available for that node reflect the substances for which the paper had provided readings.

I would assume that the Mean_Free_path and Index_of_Refraction settings have basically been varied, if the internals of Scatter are at all like the externals for Custom_Scatter.  No idea whether they're based on the same algorithm or not.  :unsure:

But BB could almost surely tell us.  :laugh:

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Cage can be an opinionated jerk who posts without thinking.  He apologizes for this.  He's honestly not trying to be a turkeyhead.

Cage had some freebies, compatible with Poser 11 and below.  His Python scripts were saved at archive.org, along with the rest of the Morphography site, where they were hosted.