UE4 Dark around Vent when player inside

I am trying to make a section in my game where you are walking trough a Vent and I would like to get a simillar look to Little Nightmares. Where everything around the Vent is dark so you cant see outside of it. Im quite new to Ue4 so I dont really know how I could do that in a good way.

I thought that I could maybe work with the post process volume to get some darker effect around the edges but I don`t think that will do the job. Any ideas would be appreciated.

year later, use two sided material on your pipe ! <3

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damm man, thanks still

with pleasure, can you close this topic ? marking as resolved, good luck for your dev diary, see you around