This looks great! That must have been some long hours until you got that result, if I look at all the detailing you have done there.
I have been reading about matte paintings the other day, because of an assignment I took upon me for a small company and I was intrigued how a technique like that could stay in the industry that long. I mean from the beginning of filming they already used and nowadays it has its' electronic version.
Fascinating stuff you have made, I am very curious for your next project.