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Before we go, something else that can be of interest is the position in which the Post Process Material we create is inserted within the post processing pipeline. If we take a look back at the Details panel for our material, we can see that there are several options if we scroll down to the Post Process Material section:

The position in which this happens can be important, depending as always on your particular scene. For instance, selecting the Before Tonemapping option means that the effect we are creating happens before the color grading and tone mapping operations happen in our scene. That can be of interest if we need to access the raw values of our level in case any of the corrections we are introducing later is causing issues with our scene. It's always good to take that into consideration, so do have a play with those settings if you are experiencing any issues with the materials you create.