Are you using the AR mode? In regular virtual camera mode the Post Processing Volume is definitely working. If you’ve updated your project from an earlier version of UE4 you can try to duplicate the PostProcessVolume and then delete the original. That has helped me before when I’ve had issues with it. 

Hi,

See this screen capture from Unreal for Aximmetry :

You can se in the  bottom right corner the view froman Aximmetry Virtual Camera. The Virtual camera view does not render the Post Process Effects, obviously the ambiant occlusion for example. I checked with a tracked camera and got the same issue. 

Did you try what I suggested? Maybe you’ve made some changes to the Aximmetry camera that overrides your PostProcessingVolume settings? Try removing the Aximmetry Camera again and install it again. Also, have you checked the results with the cooked scene in Aximmetry? 

Hi,

I'm going to retrieve a scene copy in order to make tests, including yours. FYI, the issue appeared after the aximmetry camera was added today.

Hi,

Copying, deleting and then pasting the postprocess volume made interact with the virtual and tracked cameras.

Many thanks