-
-
In your desired scene, go to Window > Package Manager and in the second dropdown menu in the top bar select "All packages". Look for the "Post Processing " package, and click on "Install" on the lower right.
-
-
-
Create a new layer for applying post-processing effects by selecting any GameObject, clicking on "Layer" selecting "Add a new layer" and naming it however you want (for example, "Post Processing"). Only leave that layer selected if you know why you are doing it.
-