i believe that all realms are inherently all bound within (and therefore, without) each other(as well). i see no difference in the psychedelic version of reality, and the baseline reality that most of us perceive, apart from the fact, that conductivity of my cells increases while on a psychedelic. i should note something important though(because it's been well documented elsewhere a la "runners high"), i can reach a (near?) identical replica of this while im training (kickboxing). once i am completing a warm up before a workout(and especially during the "peak" of the workout), i feel the conductivity, the activity, and the harmony of the systems working together, increase, and even my sight becomes psychedelic in the same way as tripping. if i close my eyes, the colors are intense, and the geometries become very apparent to me as well. it's no different in my eyes. other than one is endogenous (all natural, created in and of myself), and the other, is "synthetic" i guess is the word...
that's misleading though, "synthetic", it doesn't sit well with me, because food is what gives me my energy to work out, and mushrooms are food. but that special aspect of the mushroom doesn't require me to do anything to receive this enhancing of my perceptions... im at a loss for an appropriate word, but i think i've made my point as well as i can for now.