Here is a new character I just finished check em out! =D
Building enormous castles, medieval city infrastructures, and then laying dormant in adjacent rocky mountain sides. Be alert party members, the very ground we tread on might be one of these sleeping giants.
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I think you could push the shaders to look like the concept you have on the far right if you wanted to. This game i was looking at was able to pull it off in their shaders http://www.rainslick.com/gallery . I'm not sure how to do it but it seems possible.
Texture: Some color variation can go a long way. Perhaps try bouncing some green glow/light off the body.