I know it doesn´t have a pivot point, but it can rotate around it legs , because the legs and the arms can rotate in any degree ( maybe I do an animation with it, so I thinked in this unique way to move, but if it don´t go soo good i can change this later).
I pretend to change it a little today, but i don´t know if I will have the time. Will try to add lens to the cameras.
And about the textures, it is only a layered material that uses a basic color and a Default Sky Texture Map to make those variations with a second color, and also a bump map.