The camera, when activated with post-processing, cannot achieve transparency

[DearIcer]

Environment

Unity 2022.3.17f1
Universal RP 14.0.9
UniWinC 0.9.3

Description

I need some post-processing effects like anti-aliasing, bloom, etc. However, after enabling Post Processing, the background transparency is no longer effective.

[kirurobo]

The default shaders in URP do not seem to be able to keep the alpha channel.
It seems that alpha processing was added in URP 17, but I think we will need to use customized shaders in Unity 2022.

• Unity Forum Transparent RenderTexture with PostProcessing
• Unity Manual Waht's new in URP 17 (Unity 6 Preview)