to make fake subsurface you can use the cubemap function with a lit sphear mapped to it. you will need to make the lighting in your scene match the cube map you make though.
ive attached the ones i used to do this
no worries, i was trying to make a generalised fake lighting system that doesnt need lightmap uv´d meshes, so i can have things in scene not need lighting to help optimise large scenes but fun things happen when you experiment
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Right! 3D graphics are all about those little tricks / illusions 
At least until raycasting becomes more accessible.