If your error is what I think it is, it is to do with the game rendering underwater vegetation, a problem which has come up on some AMD cards.
Something you could try would be to follow nebej's temporary manual solution:
(09-22-2015, 09:01 PM)nebej Wrote: You could try a temporary manual solution if you would like
Rename the undergrowth folder in the game folder to _undergrowth. This will disable rendering of the terrain vegetation (which it looks like is the problem)
I pulled that particular quote from this thread, since you seem to be having similar issues:
https://www.frictionalgames.com/forum/th...25416.html
Furthermore, I recommend making sure you have the latest graphics drivers, whether they are AMD drivers or not.