I love the Fog of War feature for keeping a sense of uncertainty with the players and it has become one of my favorite tools to use in dungeon crawls. My idea is that there should be an option to reveal fog of war with a polygon tool rather than just the box tool as some of my maps have slanted/not squared walls and revealing the whole area with the box tool shows empty background space which takes away from the immersion. I hope you will consider it, keep up the good work!