I've been making changes to the light system and FOV; FOV depends on the time of day when in outdoors, and a light source is required to make indoor tiles explored when they are no longer in FOV. Light sources also affect outdoor FOV, for example at night the FOV is 4 (previously 8 at every time of day) and with lantern it can be increased to 6. Torches will give +1 FOV, and lanterns +2 FOV. I'll figure out a way for rogues to have tiles explored without a light source since they cannot enter stealth if a light is on.