For the others who ware intrigued but don’t want to read, the article is mostly about research into the mechanisms creating the hallucinations.
Neuroscientists have known since the 60s that you can make people hallucinate shapes and colours by exposing them to strobing lights. It seems that syncing the lights with some of the rhythms present in the brain changes what people experience but the mechanisms at play are still unclear.
Clearly these things are influencing how the brain process information but much remains to be studied.
Are you saying hallucigens and psychedelics are not enough for you? Maybe you'd prefer deliriants, though that's kind of the dark arts part of the world.
In short, my interest in psychedelics was nothing more than a phase, and one that many young people go through these days. It gave me some interesting experiences and don't regret doing them, but those experience didn't change me permanently.