From a first person perspective:
"Once I reach very fine levels I can see that I can switch awareness in and out at will with extremely minimal disturbance. It’s like everything would be as it is but I would be present in one moment and in the other I would not be there. It’s like breathing. I must work towards consciously breathing without altering anything from the unconscious which was going on moments before. Another thing I have noticed is that I can feel the effort of my eye focus muscles and some movement of my consciousness in the middle of my brows which brings me back to the physical reality. To move into non-physical realms I have to learn to leave these entirely relaxed with no disturbance but still pop in my awareness.
Another interesting thing is when I am not there it’s not that I am totally absent like sleep. What we call mechanical or automatic is a blurry faintly aware state nevertheless. By definition when you are NOT aware, there is NOTHING and you absolutely would not know/cognize it. An example of a fainter abstract awareness would know that you had a dream when you woke up but remembering nothing from it. That means there was some faint awareness of the fact that there was a dream vs. nothing.
Maybe it is like if you have a 1mp photo, you can see all the buildings windows etc. of the scene. But if the picture has only 200 pixels, then it would look blocky and you would not be able to recognize anything but yet roughly figure out it may have buildings. So maybe the 1mp is like advanced awareness and recording of dreams and the 200 pixels is just ‘knowing’ you dreamt.
Also, an interesting part is what is recorded to memory or what is not? What is the threshold of awareness detail required for memory recording? The most perplexing thing is I can recognize someone very easily but not be able to draw their face/or recognize a place but not recall any details of it/recognition of a song that you heard it in xyz place etc. That means only recognition without reproduction is also another ‘dim awareness vs. advanced awareness’."