I haven't looked or used this lately, but logic would have me think that essentially, there is a Scene-level setting for Glare, and then each object can have their own that overrides the scene settings: It can override the scene settings (box 1), and if so, it can both do either accept glare (from the scene)(box 2) and it can contribute glare (to rest of the scene) (box 3). Something like that?