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Fixed in future release



Found in


Issue ID




RectMask2D stops masking, when it's child has a child with Mask and Image components inside the RectMask2d area




Priority: 2Necessary for shipping a final release


Severity: 3Workaround is possible

It reproduces when UI Object with a "Rect Mask 2D" has a child object (which is not the first child in hierarchy) which also has a Child with Image(script) and Mask(script) components. Also, there must be another UI element on the Canvas, so that object with the "Rect Mask 2D" is not the most bottom child of Canvas.

To reproduce:
1. Open "Test" scene, from ""
2. Open Game (or Scene) window and inspect, that RectMask2d is working correctly.
3. In Hierarchy find "Canvas -> RectMask -> Parent_of_Mask" and enable "Parent_of_Mask" object.

Expected result: Enabling this object does not change the way RectMask2d works.
Actual result: RectMask2d is no longer working.

Reproducible: 2017.2.0b6, 2017.2.0f3, 2017.3.0b4, 2018.1.0a1
Not Reproducible: 2017.2.0b5

Make sure Object with RectMask2D is the bottom child in Canvas.

Comments (3)

  1. B55c31a6949126e513acafe0f8392845?d=mm


    Jan 22, 2018 23:40

    Dealing with a similar bug in 2017.2.0p2 (in our case the RectMask2D just randomly clips or doesn't clip various things). A workaround that *seems* to be working for us is to call this at startup somewhere:


  2. 1e578ff7c407631b8b3a23af0ce4cd6c?d=mm


    Jan 11, 2018 14:53

    Reproduced in 2017.2.0p3

  3. 4f900efb70ed95fb6c2112b0ce022ba4?d=mm


    Nov 03, 2017 13:03

    Reproduced in 2017.3.0b7

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