What sort of 'thing' is your experiential world? Is it made by something which is not an experiential world? Other people have their own experiential worlds even as they appear within your and you in theirs, with a noisy and lossy communication between them. Apparently two or more experiential worlds can share the same brain as substrate, at least taking turns at it, but cases in which two selves share the same experiential world are at most rare and momentary. Since it seems to be something parametrised space, can you imagine two almost identical copies of the same world, but still experienced separately? In that case nothing in that world, the whole algebra of its qualia is what actually makes it yours. The lights can go off, it can be withdrawn in deep sleep or death and then could it come back, yes in the former case, no in the latter? Doesn't there seem to be a superspace in which these experiential worlds arise? And is there some property of that superspace which underwrites identity in the deepest sense? The experiential world feels as if it is the inner layer of the 'real' world, fitting tightly over it. But then what happens when you are deeply affected by a piece or music or art? It seems to open inwards in a strange way, and such modifications of experience, like dreams, seem to be essential to its maintenance.