SIX-LIMBED-ALIEN-CREATURE Mental Ray render of the model with Norm Map  generated from Zbrush.       This started as a color study for the texture. This is the final concept sketch. Once I finished this one I started on modelling it. This was the very first concept. As you can see it has four limbs and not six as in the final sketch. I simply wanted to do something more complicated so I added another couple of Arms. Completely different but in essence this one helped me have a better idea on the reptilian-like skin for the final sketch. Study for the Skeleton... ......and the Muscles.