To add to Infectedstyle's post, I would add:
How complex are the geometries?
and
How multidimensional is it (i.e. 3D, 4D, 5D, 6D, etc...) - this question is obviously difficult to answer in a very specific way because we generally aren't familiar with the upper level geometries to the point where we can make exact distinctions, but on breakthrough experiences where things just get more and more and more complex, the increase in dimensionality beyond the fourth dimension is obvious to me.
also
Are there elements of the sacred or of ancient cultures? IME these tend to require a bit more concentrated "DMT energy" to form.
"Science without religion is lame. Religion without science is blind" - Albert Einstein
"The Mighty One appears, the horizon shines. Atum appears on the smell of his censing, the Sunshine- god has risen in the sky, the Mansion of the pyramidion is in joy and all its inmates are assembled, a voice calls out within the shrine, shouting reverberates around the Netherworld." - Egyptian Book of the Dead
"Man fears time, but time fears the Pyramids" - 9th century Arab proverb