One privacy mask in <shelterList>.
id: number
Mask number, 0 to 7.
optional
enable: number
1 to keep the mask, 0 to clear it.
optional
layer: number
Mask layer.
optional
color: number
Mask colour.
optional
topLeftX: number
Left edge.
optional
topLeftY: number
Top edge.
optional
width: number
Width, 0 or more.
optional
height: number
Height, 0 or more.