Hey Ark, to answer your question he created a 2 way tiling texture that is compiled of different "strips." So every objected isn't sculpted. He more than likely created long strips sculpted and textured them, and took the uvs of the model and just layed them over the texture. Judging by the resolution its a 512 texture.…
Thanks for the comments folks. Zipfinator : For metal I just do it by hand. I start with the clay tool and rough things up a little, enough to just give things a bit of a warble. Then I do some subtle damage with the clay tool, maybe mask some more areas I want to pop out an additional panel of metal from and deform it…