This has turned out better than I could have hoped!I even managed to do a bit off sub-surface scattering. I dont know if I went the right way about it but its ok'ish.
I will call this finished for now.I'm still trying to figure out layered rendering and Alpha masks and boring stuff like that! It seems the more elements you have the more things can wrong. I am in danger of becoming obsessed,which is a thing I try not to do.....