Tried that too, i told myself out loud that i was dreaming and i had full control, i ended up getting slapped by some girl who told me i was acting insane, and i've tried talking with people, their just like people. . i havent even met anywhere close to all the people there is in my dreams, a single town alone has between 50 to a couple hundred and some of the larger ones seem to be closer to a thousand. the sheer size and consistancy is whats making it so weird, i mean, on a single continent it might take me several days to go coast to coast and when i go back if i go the same route things havent changed, theres not new features or landscape in the distance, I tried keeping a dream journel as i said earlier, my friend thought i was writing a fantasy novel when i finally worked up the courage to show her. literally i've tried every test i could imagine, its consistant, its my own mind but the knowledge the people in it have is accurate to the world that is presented, i try talking about modern things i get a dumb stare.