Look in a mirror. How does your coe move within the image of that mirror? Doesn't it seem like there is depth, as if you can look deeper into the mirror's image? Or more shallowly? But isn't the mirror a flat surface?
Isn't it the same with a computer's monitor or a phone's screen or a television? Depth can be perceived as if looking into another "dimension" or world, and in the case of a mirror, where everything is the same, and moves in the same way, but flipped right and left.
Proprioception can move around the physical body as qi. When proprioception is moved around off from the body, it is transqi. Isn't the movement and configuration of transqi off of the body, like a "tactile mirror" of proprioception (showing you your proprioception ahead of you), unflipped, but doing exactly what would be or is happening as movement of qi at the body? And the same with sensing transqi in front of self. When you proprioceptionally sense something that is in front of you, wouldn't the least amount of energy used to guide a production of this - especially used for transforms / visualizations and movements thereof - be the exact movement of qi at the body? (Besides conversions from experiences under spiritual pressure, making discontentment.) Does that take the least amount of energy to observe? But! offsets can be from visible environment, or virtual visual environmental, or from proprioception, or "virtual proprioception", or from some combination of these! Here, the attempted discussed subject is a more minimally energetic scenario. For example, if sitting and breathing is one of the lowest energetic levels of activity for a body, then any proprioception(ally guided visualization / transform) that is basically just a copy of bodily changes which happen while sitting and breathing, but placed in some distance in front of the self, is one using very little energy beyond the bare minimum to make it in front of oneself at that distance. And this copy has similarities to a mirror's image, although it's more like a projection.
In a way then, visualizations which are more complex than just a copy of the physical body's basic (perceived) changes, are (energetic) offsets, of those most simple visualizations, which are really at something nearer to, or a copy of, coe at a propriovisual level.
Now look at a mirror in the dark. What do you see? Maybe some dim forms, indistinct lines. Does the mirror still have depth or is it now perceived as a flat plane? You likely can perceive the image in the mirror as either. When you close your eyes, can't your eyelids be like a mirror viewed in nearly complete darkness? Then couldn't you also perceive depth through your eyelids, as you might in a mirror seen in darkness?
Both of these: visualizations seen in front of your physical body, and seeing depth through your eyelids, are examples of Mirror Points (MP's). These are points at which there is a Reasoning of Sufficiency (ROS) to, at some physical point in sight, stop seeing the physical as much, feeling it is sufficient at that/those point(s), and begin the visualization at that location in space. If you think about it, it is exactly the same as what happens when looking into a mirror in a lit place. It's like your consciousness says, "This is enough! At this location, at the mirror's surface, I will begin to see into a world that isn't physically there!"
And what happens when something in the mirror is halfway in the mirror's image, and halfway out of it? Does it disappear? What about that, but with visualization at mirror points, instead of a physical mirror?
And mirrors can be put at various angles, and they can have variable shapes. What about this for mirror points? Can physical mirrors be easily rotated in "higher dimensions"? What about mirror points?
Can you have some mirror points of one way and other group of mirror points of another way, interspersed in each other? In the same moment? Can you have a "tactile mirror" of mirror points behind the self or even otherwise in relation to the self/body? Also at the same time as mirror points in front? Could you have mirror points in the heart, or at a "4D" angle that is perceived relative to the physical body, but not perceived in the ordinary "3D" environment? Can you have one group of mirror points behind or beyond another? Can you put mirror points in the "mirror image" of another group of mirror points? Can you make nearly undetectably thin lines of mirror points? What else can you do with them?