nice work so far, its impressive
I gotta keep working on the textures and then the main part of the project: animation.
most of the textures are looking great, although for the neck i would mix a diffuse (roughness 0) set to grey, with a gloss (roughness 0.15) and set the mix factor to 0.1, should give more rubbery looking results
looking cool, love how you have done the face/visor thing
need some feedback