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Note
MaskGroup nodes do not work on all Roku players (specifically, MaskGroup nodes only work on players that support OpenGL). On players whose graphics do not support OpenGL, a MaskGroup node just renders its children without applying the extra alpha mask. For this reason, you should avoid using the MaskGroup node for anything other than decorative purposes, such as creating a fading effect at the bottom of the screen, where the user interface information value of the screen element is not affected by the lack of the MaskNode node rendering.

Unlike other bitmaps, the MaskGroup node class does not work with 9-patch images. If the bitmap size does not match the group bounding rectangle, the edge rows of the mask are repeated as needed.

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