Hi!
I have a Canvas with a GameObject on it, and a MaskRect2D on that. As a child of this object, I have an image. It is not clipped, as I would expect. I’ve messed with the size of the Mask’s RectTransform so it’s smaller than the image in question.
I can’t find much documentation on how this thing is supposed to work, and the Unity tutorial on Mask isn’t much help either.