It could be that imagination is overrated

But where is this source material you build trips with then. I am not what Global means though. Isn't imagination part of our mind?
I understand the notion that subconscious life can manifest the unimaginable. But in a solipsist way, there is no such thing as unimaginable. If it exists, it must have come from the self. Don Juan would disagree with me. He would say there is the tonal and the nagual. The nagual is the unknowable and the tonal the island on which we experience reality. There is our inventory.
"There's no doubt in my mind that they didn't simply give me the impression that after layering themselves there was some extra morphing inferred by my brain, because if you were there it would be clear that this could not have been the case."
Well, that, to me, could reflect what I have talked about elsewhere. Awareness creates a bubble consisting of its own energy around it. It emits its own self upon it and so it gets lost when the reflection comes back. Awareness is omnipotent and omniscient. There we are. There is no doubt in me that we can imagine or dream up or invent the most incredible things.
One way to look at the DMT trip would then be that you tap into Potential itself. From Potential can come anything. That is why these visions could never be taken out of the trip into the real world. They follow complex new laws and a universe able to hold them. This universe don't seem to be able to. But Awareness I am sure has created, on that canvas multiple realities that we cannot even conceive of with our ape brains. Perhaps the visions come from such a place. Complete other laws of phsyics, or realms where there are no such laws at all, where more freedom is granted to consciousness.
So what Trppym says sounds right to me. There is a part of us that is infinity creative. Call it Potential or universal consciousness, those might just be different words for the same thing. The brain has its limitations but they seem specific. You cannot e.g. manifest the DMT visions into this material plane.
But Niels Bohr dreamt up the atomic model. I do never exclude the possibility that reality then conformed to that model and that the reason why we see that model when we use microscopes, is because he manifested reality to reflect the dream. That is what we humans do, we change thought into reality. We envision a building, we draw it out, then we use contractors to build it. We are changing matter into other matter. The limitations of this world are what we have to work with, metal, stone, wood, plastics etc.
In trips we have no limitations. The brain seems to me merely a quantum antenna. The material planes' machine or the keel of the boats we are that always sticks into the quantum world. It is an interface-connection device and a bridge between our power to manifest reality, perceive what we create and gives us readouts on it to ponder on.
It could well be, that the carrier wave ( I heard it again in my dream last night when I woke up in a dream) or at least our individuall varying interpretation of this thing, felt bodily to some, audible to others and ranging frequency shits of it, is a built-in mechanism to access other realities.
You know, if Awareness Energy created this reality and set off the Big Bang, which I call the extraction of a zip file, part of that zip file would have been that there are methods for entities to cross over into other dimensions. Awareness created reality I propose as a play pen for infinite experience, where things can undergo the formal act of occurring. It would make little sense that entities within our particular universe would be denied access to other realms of experience.
One way to look at it is that DMT and other psychoactive are meant for that, so consciousness can expand into the most unlimited realms possible. But in principle, if we are here to experience life in our ape way on rotating balls racing in space, and if we would find ways for new experience, there is room for it to occur. We can change the way things work. And then the things you see about Pharonic multi-dimensional holographic whatevers will be possible if we so desire.
So, DMT as the loophole in the fabric of reality sow e can experience even more than this shaped universe would allow.
And the carrier wave is the ride in.