Description from original post (created 2012-11-01 22:45):
Original Skin Outline credit goes to RailBladerX http://www.planetminecraft.com/member/railbladerx/
I decided I liked the main outline of the skin, and he made one called "Space wolves" but pre-heresy or during- they were the Luna Wolves, then recreated into the Sons of Horus, mainly in the novels they revolved around the 10th Company Captain Loken. I wanted to use the outline for the old Luna Wolves skin, plad gray, black, and white armor as described in The Horus Heresy novels. The colors aren't historically accurate, but they resemble the Astartes warriors on the front of the first book "Horus Rising" also one of the best in my opinion. 
The novel "Horus Rising"
It took an 1hr+ to re-shade it correctly to make it look good enough to wear. Not perfect, nobody is but I sincerely hope you all enjoy what I've done with it.