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
(39,100 posts)Irish_Dem
(77,782 posts)chouchou
(2,602 posts)Ocelot II
(128,249 posts)wendyb-NC
(4,528 posts)rsdsharp
(11,524 posts)Sometime cloud cover was low enough that there was no view. It was like working wrapped in cotton batting.
2naSalit
(98,839 posts)You can see SOMETHING down below, could get weird otherwise.
hlthe2b
(112,088 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
(21,903 posts)Sorry - very off-topic. But isolation is scary in many forms. That's why prisons use it as punishment.