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Bug Transparent pixels on UI Images are rendered as white on some iOS devices

Discussion in 'iOS and tvOS' started by unity_G8Q03EtzOQk4Xw, Dec 31, 2021.

  1. unity_G8Q03EtzOQk4Xw

    unity_G8Q03EtzOQk4Xw

    Joined:
    Sep 11, 2020
    Posts:
    2
    Hello,
    Today I upgrade my project from Unity 2019.4.24f1 to Unity 2019.4.34f1 and got a strange issue on some OS devices. Transparent pixels on UI Images are rendered as white.

    1/ Bug screenshot:
    upload_2021-12-31_16-9-56.png

    2/ Normal screenshot:
    upload_2021-12-31_16-11-8.png

    For the overlay transparent background, I use this setup:
    upload_2021-12-31_16-16-40.png

    This issue occurs on some iOS devices: iPhone X, iPhone 6S Plus, iPhone 7 Plus, but does not occurs on XS Max, iPad Pro.
    Note: this issue only happens with UI Images, all SpriteRenderer are rendered correctly.

    Could you please help?
    Thank you.
     
  2. Igsunity187

    Igsunity187

    Joined:
    Nov 26, 2020
    Posts:
    2
    We have meet the same problem, today, when upgrade from 2019.4.28 to 2019.4.34!!
     
  3. brockemon

    brockemon

    Joined:
    Dec 21, 2012
    Posts:
    46
    Confirmed. Rolling back Cloud Build to a previous version
     
  4. Moonjump

    Moonjump

    Joined:
    Apr 15, 2010
    Posts:
    2,572
    I had a similar problem with white appearing on iOS devices, although it was all transparency for me. I got around it by changing the Color Space to DisplayP3.
     
  5. Igsunity187

    Igsunity187

    Joined:
    Nov 26, 2020
    Posts:
    2
  6. wicea

    wicea

    Joined:
    Jan 23, 2016
    Posts:
    18
    Confirmed.

    Unity 2019.4.34f1
    ---
    iphone 11, iOS 14.8.1 - OK
    iphone 7 Plus, iOS 15.1 - OK
    iphone 12 Pro, iOS 15.0 - BUG

    Unity 2019.4.31f1
    ---
    all devices - OK
     
  7. TheVirtualMunk

    TheVirtualMunk

    Joined:
    Sep 6, 2019
    Posts:
    145
    Similar issue:
    Bug iPhone 6S + iPhone Xs:
    upload_2022-1-21_9-42-44.png
    Editor and Android:
    upload_2022-1-21_9-43-33.png

    EDIT:
    Strike that, it was an issue with a submodule and cloudbuild
     
    Last edited: Jan 21, 2022