A look at creating a shader in Maya Mental Ray for realistic human skin, from Jon Tojek who shows how to build a shader network that will have wavelength dependant scatter for a more pronounced red color bleeding effect.

This is part one of a two part tutorial that shows in detail how to set up a human skin shader in Maya with Mental Ray

By having a stronger red channel in Subsurface Scatter the sin shader will have more red looking edges in the shaded areas, and thin backlit areas.

Jon notes that this is an older tutorial that he is posting, and is for Maya 2012 and earlier as Autodesk Maya 2013 and newer have this feature actually included in the misss_fast_shader2 phenomenon with RGB breakouts in the front and back scatter radius.