I think Zyrkael may be right. I did the same thing and it seemed to clear it temporarily from my immediate field of view, but the background area that would be fog then just turns black. If I exit and reload the black box comes back, and I have to go into the settings and mess with the bloom slider to get it to go away again.
Thank you!
This is still in an issue in the latest update. It effects glowing item frames also and causes a checkerboard pattern of light when looking at maps, making some frames too bright and some too dark. It goes away if theres very low light in the room.