I'll try to talk abit on this
I've worked with dmt and changa [not a whole lot of freebase harmalas added] alot int span of time, ever since I joined this site, so I'll preface with that. dmt/changa really has been my main focal point over all these years.
For me the visual aspect of the experience ties in completely with the thoughts, the feelings, the bodily sensations [for as long as you can be aware of your body] - it's all tied into ONE thing,
one event that's happening to me, there's no separation in these things as they're happening. Ime it's also very important to close your eyes, and fall back into it, not trying to move around, fidget with yourself, peek around on the outside world as it takes over - there's often a fine line on the experiences escalation being from whether or not your eyes are opened or closed. Honestly to me ..if someones even able to form a sentence and get up and move around ..then something is amiss there.
Tickling the tummy of the beast there I think.
The experience is coming from behind your eyes [or so it seems], behind your outside-poking-sensory-organs. It's coming from within [
though paradoxiacally it's also woven entirely with reality/subjective experience]. The experience is crystal clear when I lay back and close my eyes, no fuzzyness, no blurred edges, none of that. It's beyond clear. The most terrifyingly beautiful thing I've ever seen.
Also I think peoples ability to remember the more powerful experiences, especially one that comes over you quick and fast - it's hard for some I think to hang on to it, and not just get overwhelmed and lost in it. Always try to remain with some sliver of focus, try to always have some mantra/focal point to help anchor your memory, as its happening, always try to stay focused and not get lost by it [which is easy to do].
^^^ Music [particular music] ime can have a massive driving factor in how powerful the experience can be. It's been my go to for years in order for me to be able to
remember, especially repetitive, melodic music, preferably female vocal'd, the experience seems to really like that.
Am I saying that the visual aspect is of most importance though? Nah [i.e.: 5-MeO not being all that visual and often is touted on being one of, if not, the most profound tryptamines] ,so no I don't think the visual aspect 'is' everything per say. But I think for nn-dmt specifically it's visual depth and power in those depths - its unmatched imo. The stuff changed my views drastically.
I say go big with it, load up big, don't be afraid of it [although apprehension and all that is usually normal], die into it, throw it all into the experience, literally just flop over like a dead fish and die into it, not much other choice once the stuff takes hold really [if you get a good dose in ya]. *Although* if you've never worked with dmt/changa alot, then it might be a good idea to start small.
Of course if you're biochem/sensitivity to the experience is there, then a stiff amount can on the right occasion, obliterate things to the point of there being
zero difference in your subjective perception - inside and outside - completely wiped away [& fairly quickly], you have zero recollection or possibility of knowing whether your eyes are open or closed - there's literally no difference - mostly due to the overwhelming intensity of the experience. People do seem to vary here though, which I find interesting - peoples sensitivity to the overall gamut of the experience and what is possible with it..