A pretty d@mn nice piece of work which can be seen over on the polycount forums
www.polycount.com/forum/showpost.php?p=2037585&postcount=3431
For the record its actually UDK not UE4 
That is so awesome, those screenshots are UDK yea but he did say he is trying to make a UE4 version so will see how that works out. 
well i dont know if it looks like that on mines… or do i need to update?