After an extensive search online, here and elsewhere I have understood that _cameraOpaqueTexture currently doesnt work with URP 2d renderer. In search for a way to create a “shockwave effect” with shader graph reveals workarounds such as creating a second camera and rendering to a texture, then use that texture as a “replacement” for the _cameraOpaqueTexture in shader graph.
Just posting here to see how others have coped with this problem or if there are any latest news/updates on the matter since the latest post I have found about it is since October 2020.
Seemingly possible - haven’t tested myself - in URP 11.
Here’s a dev responding to a thread with more details on how to test a “heatwave” effect, which is similar to shockwave in theory. Unity 2DRenderer Heat Distortion shown in the Unity GDC Showcase 2021 not working
Hope that helps.
Thanks for the link!