@jamie, I haven't smoked DMT; I have a lot of experience with oral brews which I probably don't have to repeat.
About symmetry, do you guys mean to include perfect mirror images like in popular psychedelic art, or perfect mandala like symmetry on both axes of the entire visuals field? The former I believe is possible but rare and not a defining feature of visuals of any psychedelic. The latter I believe only happens when there is 5-MeO-DMT modulation of the visual field. Correct me if I am wrong.