Fog is a type of weather effect that can be added to a map from the Map Properties panel. There are two types of fog that can be enabled: height fog and depth fog. The color of the fog is shared between both.

The “Fog Floor” and “Fog Ceiling” values are heights measured in voxels (equivalent to a Z coordinate value in the tile coordinate system).

The “Fog Start” and “Fog End” values are distances measured in voxels and are relative to the current camera position.