Are Humans able to control their own Hallucinations?

Your brain has no way to discern between "normal" reality and a dream or any other reality for that matter as long as it finds itself as the centre of that reality. (you could hve no more fun in relity then you had raceing that car in your dream.
The tibetan book of the dead (which is recited to the departed/ing) is there to make the passer aware of the ending of one illusion and the transition to the next.
It takes a lot of training and practice not to loose sense and touch with the I. And ultimatley my experiences has made me value the oposite, the oblivion of the I, to become the observation while not being the observer.

P.S> sorry my keyboard is full of shit. (pot seeds I think)

78-79 I did some blotter one evening, started to peak watching "In Concert" on TV, Edgar Winter was performing. After the show I went up to my room, and watched again this time on the wall paper (grandma had the red velvet wall paper you might see in a whore house today lol it was old) But whenever I'd look at the ceiling things would just get wavy and Edgar would disappear, look back at the wall paper and he would re-appear playing Frankenstein. I tried for the longest time to "see" something different, other then Edgar, the only way was to leave the room and start roaming the streets. lol
So being able to control MY hallucinations is very limited, for me.