Quick hard surface concept sculpt. I've used Substance Designer for the final compositing and rendering.
Thanks to Christophe Desse (https://www.artstation.com/artist/christophe-desse) for his amazing tutorial on youtube which allows me to use Substance Designer that way : http://youtu.be/5WMiRGqk8Po
I'm actualy working on a Master Substance to quickly load all the passes from Zbrush and render it.

Made for my collaborative blog : http://2arts1week.tumblr.com/