to get the camera values in the details panel all you need to do is select the characters camera component, in this case i was working in a third person character (of course you will need to be modifying values in the players camera). i made a few adjustments to the script and posted it below, if your using it in an enemy bp then you could use the setup below, if your using it in the character bp then the above may be better. you may also want to add in some checks as well to make sure that the timeline doesnt called if multiple enemies begin overlap.
so the way this all works is that it doesnt mess with your post process volumes in your level it modifies the post process settings in the characters camera which blend out and end up overriding your scene post process. if your scene post process is vital to the look of your game this may not be the best way to go.
