Left the game for a week, and now in certain interiors while looking in certain directions, everything turns white and I can occasionally see into far off areas. This includes the area I had left immediately before making the save. Am I going to have to reload an old save to fix this? I have no idea what could have caused this. I had just finished talking to Hancock at the end of the Silver Shroud quest.

that's room marker issues, there's some faulty setups in some locations.

it's just a visibility issue, you won't fall or anything, just not see where you step until you're past the "white barrier"