What can be this graphical problem?

[Fifi]

Originally Posted by gap

I think it is a know incompatibility issue between the buggy SHIII shadows (disabled by default with patch 1.4b) and normal maps used on crew models.

And can i do something to solve it?
Could it be also related to volumetric clouds WAC have?
It could be linked to an external environment (always on deck but never other place) that my GC doesn’t like...

The strange thing is it didn’t affect the game at first, but sometime later on second or third patrol, not that often at start but suddenly more and more to the point at each time i go on deck