I created a mission where it starts VERY foggy early in the morning. There are boats about 300/400m from the shoreline the mission starts out in.
The fog being so thick, the player (person behind the screen) can not see even 50m away. But can spot the enemy as well as AI.
I have uploaded a picture (it should hopefully describe what is happening) I will see if i can create a video of it.
{F17975} {F17976}