I make a custom PostProcess. This is the csharp code. As you can see, I print some text at the first of Render method. Then I add my custom PostProcess to the injection point. At this time, My custom PostProcess already affect screen, even if there is not any Volume in scene. It's a empty scene. Some text I printed display in the Console. It means Render method always working, even if there is not any Volume in scene. Is it a bug or design? Thanks.