Then there is what happens in our minds. What happens on the psychic planes as we astral travel. These must be cultures in and of themselves. Some would call them thoughts, however I am sure it can be an entirely different kind of cultural context.
There is a culture of the macrocosm, the so called external world. But what about the microcosm, the universe within us. Makes me think more about, how do we define a cultural context within art.