Yeah, it's funny to think that all we have is 2D input and yet we perceive reality to be 3D. I like to close my eyes and remember what the 3D reality is like, and think about how amazing it is that it seems to exist somewhere in my mind even when i close my eyes. Infants must wonder similar things since they haven't yet been trained to accept the information from their senses wholesale. I bet giving DMT to a baby would have a weird effect on the development of their perception of spatial reality.
Every day I am thankful that I was introduced to psychedelic drugs.