[2020] Remove the fog of war?

I'm assuming you mean for your map? It's sorta possible when in debug mode; But it's also a temporary change, not permanant.

Enter debug mode, open your map screen, and in the top right of the panel should be a new little switch lookin thing that wasn't there before, from which you can access the debug map which has a few different viewing modes.

Originally posted by seven: You could also enter debug mode and then fly around which will reveal the map permanently. It would take a while. You can also run really fast in god mode which might be quicker than flying.

You can only reveal so much. After you reach the limit, it will start to "forget" the earliest uncovered data.