He is probably using this workflow. http://polycount.com/discussion/168610/proboolean-dynamesh-hardsurface-workflow-tutorial/p1 Is a nice way to make a complex object fast with nice looking edges.
Thanks Azkur, I was just in your thread thinking I wish I had your hardsurface/organic skills, looking at that robot it's similar to what I want to do with the girl.
Updated most character hardsurface bits to sub-d, added tasseled apron, and updated arm straps. Started on the hair in the back. I'll need to press the strapped rings into the flesh soon.
Cool stuff, I'd soften the edges on the hardsurface stuff (the grenades/suppressor/radio?), they won't bake down all that well in their current form :)
i think this tutorial will help you out on sculpting and modeling organic and hardsurface props https://www.thegnomonworkshop.com/tutorials/creature-modeling-for-production