Fog of war allows you to only reveal certain parts of the map or more map over time. Using *f will activate fog of war on your map. From there you designate the top left square and the bottom right of the area you want to reveal as in*fb2d2. example seen below.
Note - Fog of war will only be active if there is a background image loaded and *f is present within the map URL.
Example
https://otfbm.io/@d/*fb2d4/*ff2h4/*fb6d8/*ff6h8/10x10/?load=https://cdn.discordapp.com/attachments/740988703689801850/763079108636049459/DeathHousev3.json
