Split the post process area

Hello Every Experts of UE4,

I just have a question for the post process,

What I am trying to make is One big post process area that makes the scene mood, and smaller one that is inside of the big one and blocks the post process from the big post process area.

From the answerhub and other site, I made the node graph as below

It works perfectly,
except one thing, I cannot save my original scene color.

It would be very thanksful is you give me any hint, or guideline.

Thank you for reading my humble question.

Try using 2 PostProcessVolumes and apply higher priority to the inner, smaller one. Then use 2 different post process materials on them or don’t use any for the inner one.

Thank you for your help,
I tried your way, but it does not work

and I forgot big condition that is

The inner post process must block outer Post Process volume inside of the volume. but outer post process volume need to be as it is out of the inner volume

such as the Rapture city in the video game “BIOSHOCK”

sorry for making confusing