Photography
Related: About this forumKind of how fog FEELS in a fire lookout tower .. it can be claustrophobic after a couple of days
And this was after the visibility finally improved from nil to about 1/8 mile (and yes, your world is basically one big whiteout):

Bitterroot Range - Idaho Panhandle
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Diamond_Dog
(39,646 posts)Irish_Dem
(79,378 posts)chouchou
(2,738 posts)Ocelot II
(128,839 posts)wendyb-NC
(4,589 posts)rsdsharp
(11,741 posts)Sometime cloud cover was low enough that there was no view. It was like working wrapped in cotton batting.
2naSalit
(99,709 posts)You can see SOMETHING down below, could get weird otherwise.
hlthe2b
(112,627 posts)I've experienced blizzards >24 hours when you did not go far outside your front door, seeing virtually nothing for hours at a time in front of you, and deep snow gave no landmarks. I have a friend who died west of Boulder, having done so (though she may have had a heart attack--no autopsy was done).
So, yeah, that fog would certainly feel isolating.
erronis
(22,486 posts)Sorry - very off-topic. But isolation is scary in many forms. That's why prisons use it as punishment.