I need to find the article backing this, but from what I understand it's a false perspective to call a DMT trip an "alternate reality." It's very simply a different perception of reality, but what makes DMT special is how it can be described to offer reality in its most raw form, free of human bias. Here's what I mean. Basically, it's no news that human understanding relies on patterns. We know a cat is a cat not because of a formulaic tag or universal identifier, but because of countless patterns and similarities our minds subconsciously connect, in unision perceiving a cat despite the technical impossibility of two cats ever looking exactly the same. Mathematics (best example: geometry), physics, all the way to literature and communication are constructs of our understanding in patterns, so is our concept of analysis, construction and deconstruction. Patterns. So, what DMT does is eliminate your ability to perceive patterns, the way you did "normally." All of a sudden, you're no longer seeing identifiable objects the way you were, rather you're seeing polygons and dots, constantly morphing and combining and separating because your mind is not forming them into concrete structures (patterns). You're also seeing light, as in the reflection of light off of these points and polygons. That's a DMT trip. The fun part is what happens when your brain underneath the stimulation, tries to make sense of this. You start hallucinating as your brain struggles to create structure, and identify a pattern. That's when we'll see things melt, morph, change color or seem to vibrate and echo; that's when we'll see objects and people appear and even communicate with us. That is DMT. N,N at least, I don't know about whatever other types there are.
I'm going to ask my friend for the research because I know that this all sounds like bullshit. It's maddeningly interesting though, I'm not ashamed to say I really want to try DMT.