Player transparency is not working when using URP with Post Processing and HDR enabled

Unity: Post-processing and Compositing

Won't Fix

6.0.X

2023.2.X

2022.3.X

2021.3.X

This ticket is closed because transparency is already supported in 6000. How to enable transparency 1. HDR Project Settings > Player > Resolution and Presentation > Render Over Native UI This option only appears on mobile platforms such as Android and iOS, but since it is a global option, it also affects standalone platforms. 2. Post Processing Universal Render Pipeline Asset > Post-processing > Enable Alpha Processing

Cancelling this 2023.2 port issue since the support for this release has come to the end of life. Cancelling this 2023.2 port case does not affect any LTS or Unity 6 Beta/Preview case that remain open or in-progress.

Unlike BiRP, URP does not support alpha output for Post Processing. This feature was added in Unity 6 and is not planned to be supported in 2022 LTS as it may affect stability.

Unlike BiRP, URP does not support alpha output for Post Processing. This feature was added in Unity 6 and is not planned to be supported in 2021 LTS as it may affect stability.

How to reproduce:
1. Open the user-attached project “OverlayURP”
2. Build And Run the project
3. Open “OBS” and add “Window” or “Game” capture of built Player
4. Add any other capture and make sure it is below the Player
5. On the Player capture enable transparency by clicking on it → Properties → “Allow Transparency”
6. Observe the captured video preview

Expected result: Only the cube is captured in Player and the other window is seen below it
Actual result: The cube and the background are captured covering the other window

Reproducible with: 2021.3.36f1, 2022.3.22f1, 2023.2.15f1, 6000.0.0b13

Reproducible on: Windows 11 Pro
Not reproducible on: No other environment tested

Note: With built-in pipeline the bug is not reproducible even when Post Processing and HDR are enabled

Player transparency is not working when using URP with Post Processing and HDR enabled

Unity: Post-processing and Compositing

Won't Fix

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Have a workaround or additional info about this issue?

Player transparency is not working when using URP with Post Processing and HDR enabled

Unity: Post-processing and Compositing

Statuses

Won't Fix

Resolution Notes

2023.2.XWon't FixCancelling this 2023.2 port issue since the support for this release has come to the end of life. Cancelling this 2023.2 port case does not affect any LTS or Unity 6 Beta/Preview case that remain open or in-progress.

2022.3.XWon't FixUnlike BiRP, URP does not support alpha output for Post Processing. This feature was added in Unity 6 and is not planned to be supported in 2022 LTS as it may affect stability.

2021.3.XWon't FixUnlike BiRP, URP does not support alpha output for Post Processing. This feature was added in Unity 6 and is not planned to be supported in 2021 LTS as it may affect stability.

Description

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Have a workaround or additional info about this issue?