As a high functioning schizophrenic I can tell you some of the things that are akin to LSD. However, a whole lot of it really isn't.
It's interesting because often when I take psychedelics I can distinguish my rational mind, from my schizophrenic mind, and my psychedelic mind. So these really are two different levels of cognition between being schizophrenic and being on say LSD.
The delusional beliefs aren't far from it. You know the whole you're walking down a street see a rainbow rain puddle and knee-jerk reaction think "I'm god". Which is arguably not a delusion depending on your philosophical beliefs however it is a strange catalyst to form such a thought. However the majority of the positive silly fun delusions from LSD do not occur in schizophrenia and if they do, they are often very 'severely' implicated through delusions and not from the cosmic breath of the universe shedding it's light directly to your mind. More like a voice in your head yelling at you to warn people that the end of the world is coming and if you do not obey this voice you will be slayed and sent to hell.
I suppose it is best explained through the vehicle of a "bad trip". Schizophrenia usually involves a lot of paranoia, but not the kind where if you're used to tripping you can turn a trip around... That everything is after you to kill you, rob you, hurt you, make you stand trial for things you've never done, kind of stuff. Every movement, thought, or action you are making, have made, or will make is being analyzed and you are to be punished for it and there's nothing you can do about it. Because the voices in your head are your own but they yell to kill yourself on a regular basis and there's no way to control them because as much as they are you, they most definitely don't appear to be. And because you have these thoughts that are being monitored you are to be punished, and somehow it always seems like you are punished for them. A lot of suffering. You know, paying for all of your 'sins' and being attacked by vicious entities is sort of a parallel. Except often in my experience the 'sins' I am paying for aren't even real.
A similar thing is depending on the dosage you can forget you are on a psychedelic substance and just be consumed by the experience even while walking around talking with people. Schizophrenia is a lot like this as well, psychosis in general is that by definition. Having no idea that you are psychotic and not believing that you have an illness is a HUGE problem for people with this disorder. For a trip though its not really a big deal because when you reach that level the discomfort from taking the substance is essentially gone and you just experiencing at that point.
Another parallel is probably the indecision. Like when there are a lot of things you want to do on a trip and you just don't know where to begin(unless your already in the flow). Psychosis is similar, but like that in real life.
LSD can have you think very clearly about your life, or be totally confused about the idea of having a personal existence. Schizophrenia very seldomly offers any of that clarity, I've really only experienced it by taking psychedelics. Many even well functioning in society schizophrenics do not know their preferred sexual orientation, when things have occurred in their lives, if the things they remember occurring ever actually happened, etc. Except 12 hours later we(Sz's) still don't know.
Schizophrenics are highly empathetic though. There's a good reason why too. Often when someone says something happened to them or is happening to them, the Sz observer believes it is happening to them as well. Problem is we are often confused about whats going on in general so we cannot react in real time to help people often. Which is similar to the LSD experience and that interconnectedness stuff.
I would like to clarify some things. LSD is not the only model used to mimic psychosis. PCP, amphetamines, and many other substances have and are being used. PCP is a really good model apparently for a few of the symptoms. Interestingly LSD is kind of well known for inducing temporary to lasting psychosis in SOME high risk people(not a common demographic but keep in mind 1/100 people are schizophrenic). I don't mean that as propaganda either, its pretty well documented. My psych never told me not to do mushrooms, or other psychedelics she specifically said, No LSD, and avoid cannabis.
The drug models don't mimic all of the symptoms very well but they do mimic the positive symptoms pretty well. There are both positive and negative symptoms if your interested you can learn more about them here -
http://www.mayoclinic.co...00196/DSECTION=symptoms.I made a thread to dispel some of the myths about mental illness a while back it might be worth a gander if you'd like to read it.
https://www.dmt-nexus.me...aspx?g=posts&t=35699Interestingly one of the people arguing against the existence of mental illness(hard to believe...) who I will not name ended up becoming psychotic a year or so later. Last I heard they were in treatment and doing well though, blessings to them. Wish they didn't have to learn about it the hard way...