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Fixed in Unity 2019.3



Found in


Issue ID




[Regression] Window as a Transparent overlay fails when using DwmExtendFrameIntoClientArea in the 2019.1 versions




Priority: 2Necessary for shipping a final release


Severity: 3Secondary functionality broken

How to reproduce:
1. Open the user-submitted project ("") and open "Scene"
2. Build the project and run it
3. In the standalone Player observe the background around the Cube Object

Expected result: The background is transparent, displaying whatever window that is behind the standalone build
Actual result: The background is black and doesn't display any other windows behind it

Reproduced in: 2019.1.0a12,
Not reproducible in: 2018.3.1f1, 2017.4.17f1

Comments (1)

  1. 79212bd83e867a90ff7ffc07ff16c8c0?d=mm


    Dec 22, 2018 23:25

    Tautvydas-Zilys on the forums: "It looks like it got broken because DwmExtendFrameIntoClientArea function doesn't work with flip-model swapchains, and in 2019.1 we switched our D3D11 implementation to use flip-model swapchain because it is more performance and supports technologies like GSync and FreeSync."

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