AFAIK, pretty much the only thing you can do to clear the fog of war is to look for equipment with a sight bonus. I started avoiding such equipment, so my sight range would not get much larger than the screen size (the fog of war helps keep track of where you have explored).
There is a skill to boost your sight, but it can only be learned fairly late in the game (philosophy level in act 4).
I don't know if there is a way to extract images (maybe something like
Resource Hacker?), but there is an easier way to take screenshots:
Screenshot Programs.