Scrollview softmasked items are visible outside viewport mask

[maskedmouse]

Describe the bug I've added a scrollview to my canvas with a softmasked item as child of content. However, the scrollview's viewport mask does does not occlude the softmasked items under content. Am I doing something wrong or is it broken in 2019.3.x?

The eventual use case is a ScrollView in a scrollview with content that is softmasked. Complicated layered UI. But a use case for my work.

To Reproduce Steps to reproduce the behavior:

1. Go to Sample Scene
2. Go into play mode
3. scroll the list so that the item is half out of the viewport
4. observe scroll view items not being occluded (hidden) outside of the viewport

Expected behavior Softmaskable items in a scrollview list outside of the viewport should be occluded

Screenshots

Environment (please complete the following information):

• Version: 0.10.0-preview.2
• Platform: Editor Windows, WebGL
• Unity version: 2019.3.12f1

Additional context Project for reproduction https://maskedmous.stackstorage.com/s/JYug7GMtoGk2THZ

[mob-sakai]

@maskedmouse Thank you for reporting!

[mob-sakai]

Scroll View With Regular Mask Viewport

It was due to SoftMask ignoring the stencil.

• Set the Use Stencil parameter to true.

Scroll View With Soft Mask Viewport

UIMask sprite has a small alpha.

• Set the softness parameter to 0.01.
• Or, use UISprite sprite instead of UIMask sprite.

[mob-sakai]

Action plans:

• Change the default value of the Use Stencil to true.
• If the parents contain some mask components, it is suggested to use stencil.
  • Some Mask components are found in the parents.
    Do you want to use stencil to apply the masks?
• If the UIMask is specified as a Source Image, it is suggested to use another image.
  • SoftMask does not recommend to use UIMask as a Source Image.
    Do you want to use UISprite instead?

[github-actions[bot]]

:tada: This issue has been resolved in version 1.0.0-preview.8 :tada:

The release is available on:

• GitHub release
• v1.0.0-preview.8

Your semantic-release bot :package::rocket: