It takes a long time to render a single 3d image of a head using SSS in mental
ray or vray using 3dsmax and a fast computer, I doubt it can be done at 70 fps!

Perhaps a pixel/vertex shader can approximate this effect by greatly softening
the edges of shadows and using a map that might make some areas of the model
appear more translucent by using some type of illumination. Hard to make a mesh
look like wax since it is hollow.