Lots of people try to lucid dream..but not many try to dream while they are still awake. And lets face it..dreaming is not the same as day dreaming. IF only it were I could have been having the most amazing day dreams ever...but that never happened. So do our brains alone really create these fantastical, detailed settings...It just does not feel right to say such a thing.
I feel like dreams are our only real evidence of what lays beyond our understanding of the universe. Dreams..like the universe.. are patternized. We can life lifetimes in them.....and so on