Any suggestions on the foam?

Probably some more SSS in it?

 The good thing with this shader is, if you bend the figure forward and down, and for example one arm enters the water surface, the shader will automatically remove the foam from all parts which are under water, remove the specularity from the skin the same way, so the artist does not need to care about such details.

Poser Pro 2014 GameDev, Lightwave 11.6.3, Blacksmith3D Pro 6, Bryce 7, Carrara Pro 8.5, Reality 4 & LuxRender, Python 2.7 & Wx-Python, UV-Mapper Pro, XFrog 3.5, Paintshop Pro X7, Apophysis 7x64

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Don't render faster than your artistic guardian angel can fly...