Warhammer 40k Tyranid Carnifex

Here is a Warhammer 40k Tyranid Carnifex (from Games Workshop) I am in the process of completing. The entire thing was made in Maya using polygon modeling, although I have started rough scetching via ZBrush on the tail, hip and legs. The torso and head are still untouched and solely from Maya. Arms are under construction.
I purchase the plastic GW model of the Carnifex, and used a camera to take accurate profile and detail pictures for high accuracy.
A serious ZBrush detailing is in order across the board, then some texturing to make it portfolio worthy.