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Won't Fix
Votes
0
Found in
2019.1.0a3
2019.4
2019.4.8f1
2020.1
2020.2
Issue ID
1272405
Regression
Yes
[Mac] Application with a transparent background will become black when the application's window size is changed
How to reproduce:
1. Open the user's attached "TransparentalWindowSample2018.zip" project
2. Open the "SampleScene" Scene
3. Go to File -> Build And Run
4. Press the "Enable Transparent" button in the application
5. Re-size the application's window
Expected result: The application's background stays transparent
Actual result: The application's background becomes black
Reproducible with: 2019.1.0a3, 2019.4.9f1, 2020.1.4f1, 2020.2.0a19
Not reproducible with: 2018.4.26f1, 2019.1.0a2
Could not test with: 2020.2.0a20-2020.2.0a21 (The background does not become transparent after "Enable Transparent" button was pressed)
Notes:
- The plugin used by the user is only supported on Mac OS, so couldn't test if this reproduces on Windows OS
- Make sure "Windowed" is checked in the Configuration window in older Unity versions (2018.4, 2019.1)
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Resolution Note (2020.2.X):
A possible workaround for this issue is to track the resize event and set the opacity value as desired on resize. Setting window transparency is not a Unity feature, so behavior changes may be seen across versions if trying to set NSWindow properties manually.