Is there any way to use a hollow post process volume in blueprint?

Development Programming & Scripting Blueprint
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Hi I’m trying to make a hollow smoke ball like Valorant,when I close to the edge it’ll cover my camera.

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So I made a post process material to cover my camera and add to a post process component and a sphere collision in Blueprint.But now is the question:It isn’t a ‘Hollow‘ option in the post process component but only in the post process volume.So whatever I stay in the edge or inside the smoke ,it just a fog .

Is there any way to use a hollow volume in Blueprint?Or how could I get the location of the object that used the post process material so maybe I can use another sphere mask to figure it out?

Thank you!

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Instead of trying to put the PP on the camera, you can still put it in the level, but set the parameters you want from blueprint, via a material parameter collection

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