I am making a model of an Arc Reactor. In the model, there are some wires and a sphere with emission material, inside a glass material to create a glow effect. Now I want to make these emitting objects glow and add flares in post-processing, so I was wondering if I could Isolate the emitting objects and mask out the objects in front of it so that I can mix the two images in post processing to make the whole thing glow. Thanks.
Also, I think that the center ball-like emitting piece will block the foreground of the render which I don't want; So what would be a good way to composite it? Thank you.