Conscious experience as such is an exclusively internal affair: Once all functional properties of your brain are fixed, the character of subjective experience is determined as well.
Thomas MetzingerI think that there is an ongoing conspiracy in the philosophical community, an organized form of self-deception, as in a cult, to simply all together pretend that we knew what "first-person perspective" (or "quale" or "consciousness") means, so that we can keep our traditional debates running on forever.
Thomas MetzingerI believe we should really take our own phenomenology more seriously. What a good theory of conscious must explain is the variance in this subjective sense of realness: There clearly is a phenomenology of "hyperrealness", for example during religious experiences or under the influence of certain psychoactive substances.
Thomas MetzingerI believe that if we would carefully apply the distinction between transparency and opacity to the different layers of the human self-model, looking at self-consciousness in a much more careful and fine-grained manner, then we might also arrive at a new answer to your original question: What a "first-person perspective" really is.
Thomas Metzinger