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If you prefer complete darkness when drifting off to bed at night, a sleep mask is a great way to block light and catch a snooze. The best sleep masks are ones that are good for light sleepers ...

Anti-Alias Masking Mode: If you don't need semi-transparent masks, you can use the more performant "Anti-Aliasing Masking Mode". Masking Shape: You can add or remove mask region using MaskingShape ...