This was an entry made for a Polycount contest called Guns 'n Gear for the game Killing Floor 2.

 

It didn't place, but @echofourpapa and I had a lot of fun making it. 

Later, we found out that it was to be included in the game and were asked to make some texture variants! My contributions are the two above: the skin mask and the metal mask. 

 

Here is the Steam workshop page for the mask!