My friend adjusted his graphic settings, turned HDR mode on and suddenly...
Spoiler
(https://www.fsegames.eu/forum/proxy.php?request=http%3A%2F%2Fcloud-2.steampowered.com%2Fugc%2F594754071583298675%2FC6F412E349CC17BF798CCB92A043A43DB61338A8%2F&hash=8e217cae311b36892c501c7629531bed3d7ff6e1)
All I ask is... why?
It's a rare glitch that happens in warband.
Files get mixed up and suddenly your game doesn't load the background files but a face files and then you see this monster :p
Voila
(https://i.imgur.com/lVPso.jpg)