Specifies how the sprite interacts with the masks.
Sprites by default do not interact with Sprite Masks, and remain at their original visibility even when overlapping masks. Set this value to either VisibleInsideMask or VisibleOutsideMask to have the Sprites interact with Sprite Masks. Set this value to VisibleInsideMask to have the Sprite visible within a mask, and set to VisibleOutsideMask to achieve the inverse effect.