Unlike the Cloud Object, the Volume Object renders 3D Volume objects with correct shading (shadows on the darker parts). The benefit of using a Volume Object is that it can be used to place realistic clouds in the level or for building irregular fog areas with varying heights.
VolumeObjectFile: Defines which cloud object should be displayed.
Scale: Specifies how big the cloud should be.
AutoMove: Defines if the cloud should move or not using the speed property (cloud can also be moved with the track view editor).
FadeDistance: The Distance in meter when the cloud should fade in when moving from one side of the Space Loop Box to the other.
SpaceLoopBox: Defines the box in which the cloud moves from one end to the outer (looping).
Speed: Specifies the speed in x and y direction.