The thing that gets me the most is there is no main areas of interest and that all the rocks are just kind of muddy. It would be nice to see certain areas that are jagged and stand out, and other things to not only help with interest but also silhouette. I agree with A.K in adding more variation to the diffuse as well.
This is looking pretty cool thus far. It's a pretty sweet concept and the modeling looks pretty legit. I like the addition of the glowing eyes. What size texture you working with here? Not sure if that's still a w.i.p. for you but maybe could use a little more variety layered into the diffuse. Seems like one big rock tex…