A lot of people find DMT ineffective or useless in terms of it's ability to take the user into deeper psychological realms. I wonder sometimes if it is not more of an issue with the manner in which it is used, rather than a limitation of the material or the method (smoked).
I find most people are very set on extreme experiences, having to reach a 'breakthrough' dose to make things worthwhile. I've discovered a treasure trove of effects from low dose DMT smoking. Small repeated hits can lend much in the way of deep introspection. By small repeated hits, I mean taking yourself to a point of good solid effects, while still being able to keep your eyes open and integrate the world around you. The most useful point for me is where keeping my eyes open is just a little difficult.
I use DMT in this manner to reach a sort of meditative, reflective state, and it is tremendously beneficial to me. Not nearly as beneficial as taking it orally, but much less of a committment than that required for oral dosing. It can be a sort of "Ayahuasca lite" as it were. Perfect for Saturday afternoon hiking trips.
I have a friend who had smoked DMT several times at various dose levels in indoor settings. We went to a beautiful natural area this past weekend, sat looking over the water, and we traded small drags off the DMT pipe, sitting together gazing over the landscape. It was so thoroughly breathtaking to take in beauty of this magnitude. When my friend came back down, we just sat in silence, because there was nothing to say that could be captured by words. He was close to tears having just seen the most beautiful visions of his life. He told me afterwards that the 34 years he has lived on this earth seemed only for the purpose of leading up to that very moment. He said that one experience thoroughly laid to waste any of his previous DMT experiences.
To anyone not finding deeper meaning in smoked DMT, I humbly recommend taking it to nature, cutting back the dose, and taking time to really meditate on the substace and it's effects over various settings and mental sets. I truly believe there is more to DMT smoking than sucking in a lungfull of vapour. Just like any psychedelic, the real rewards come from patient, reflective experimentation.
However, this is not to say high dose DMT journeys don't have their benefits. These too, I enjoy in their own right. I only want to offer some alternatives .... peace.