How can I have different post processing (fog and depth) for different volumes in the same scene

Hi I’m trying to make an underwater glass tunnel so inside is rendered clear and sharp, but everything outside the tunnel will be rendered fogged and with depth fading.

I am new to UE from Unity. In unity I can just use one layer for outside and one for inside and use two cameras in the same location one rendered with fog and the other rendered clear and just set each camera to see a different layer.

But in UE I think layers work differently. Sorry I can’t offer more information, but UE is a bit of an unknown unknown to me right now.

I did find a similar question in answers, but I could not understand the answer with nodes everywhere.

Thanks for any help you all can bring.

Would it be possible to use tags to determine visibility to two different cameras ?