first of - this is so cool work Kurt! I wouldn´t know how to do myself but I think I´d try to work on the appearence of the different parts of the surface. right now the material looks kind of similar on the whole creature - teeth, skin, boney parts. it appears to be a bit like plastic. please don´t be mad at me - it could also be my perception which might be wrong. I would try to give the major skin part a liquidish style and the arm part - I guess it is a bone or something - a different material than the skin. maybe less bumpmap or another pattern of bump like scratches or something. right now the creature is very homogenious in its surface apperience alltho there is showing up different physiologic body materials. sorry for my lack of explanating capabilities. but it is also very subtle. hope you know what I mean.


__ edit:

na, plastic was the wrong word. it´s just the absensce of different surfaces worked out like mirek03 said with translucence.