Great modelling work, even better texture work.
The textures really bring out the details of the model, even vice versa in some cases. And the purple glows make for some good contrast. It's verily awesome.
I do have a minor nitpick, though; those two strokes of dark brown connecting the front engines with the nose arc. I feel it's unnecessarily breaking up the dominant surface of the light-grey scales, it even looks like it has eyes up on the front. I've highlighted the areas involved in the pic in the attachment if you have any doubts.
[attachment deleted by a basterd]