When you work with AT+Explore you’ll need to delete any camera in the scene. The camera will be added at runtime by the plugin automatically depending on the build template you choose.
So if you need to edit camera options you’ll need to edit the camera that is managed by the plugin. In this case we need to add Post Processing to the camera.
First of all the workflow. You’ll have to delete the scene camera so, in order to see the effects, you need to tick this option in the scene view (you can see the bloom effect below without a camera in the hierarchy).
Now, to add PP in the build or at runtime you can search for the “visitor” prefab, open and edit the prefab, search for the head camera and enable Post Processing in the camera component like below.