Troubleshoot custom post-processes

If a custom post-processing effect doesn't display correctly:

In your Project Settings, make sure this effect is listed under one of the post process order lists (see Effect Ordering).
Check that your effect's Shader compiles and that the reference to the Material in your post process Volume isn't null.
In the Volume that contains your post process, make sure that it has a high enough priority and that your Camera is inside its bounds.
Check that your shader doesn't contain any clip() instructions, that the blend mode is Off and the output alpha has a value of 1.
If your effect doesn't work with dynamic resolution, use the _PostProcessScreenSize constant to make it fit the size of the screen. You only need to do this when you also need normal or velocity and color.