Sorry, I don't have a picture of the finished Payday masks. I created them for a friend and he was the one who built them. However, the shape of the masks should be identical to my Kaonashi mask. A photo of it is here --> tektonten.deviantart.com/art/q… I think the Payday 2 masks are slightly different.
I did not extract the files from the game, my friend did, so I am unable to tell you how it is done. At my friend's request, I took the texture maps he sent me and mapped them onto the form of my Kaonashi mask, but I did not use the 3d models from the game. I have 3d models of the Payday 1 masks if you want them.