visual bug - can see through walls

in some places like the prison and the caves in act 1 you can see through a solid wall with no way to pass through it (so it means no door \ passage) or interaction with the area you are able to see (you cannot use skills on monsters you may see on the other side).

in addition, in cave of woe (end of act 1) in some areas you can see "through" the water - you can see void shapes that get larger the closer you walk to it.