Just to keep this one alive, I decided to move on a bit with this one. So fixed the UVW and started the texture

. I just had to take some time off the M3, it makes me crazy
PS While I was making textures I noticed that my GTR is a bit off. So far I found 2 discrepancies. You have to find it

(maybe someone will find something other that I mean)
And big thanks to Xoliul for his great shader