Some senses (almost) always appear dual

[RMQualtrough]

Have you noticed that sounds for example can completely "flood" around you to where there is literally no point of origin and no "perspective".

But most visuals (apart from a pure blank color) are dual in that they require a "point of view", or a viewing position. E.g. when you see a car, you necessarily have a point of view that the car is in front of you. Though this is not the case with sound, taste, and smell.

Touch is probably the most grounding dual sense, since the removal of it will always trigger an "out of body" type experience where you simply flood out into sizelessness. Your mind attaches a sense of confinement to your visual input, it's actually really clever. Because the sight you have is an image generated from your eyes etc, yet touch is not, but the mind merges the two. So you think that the sense of touch corresponds with the edges of your body within the image from your eyes. But even with your eyes closed, it is what creates the sensation of confinement within the body.

Sounds played in certain ways (definitely in-ear) can be impossible to place in any location. I think it would probably be the same for pure blank color if it encompassed your entire vision. Maybe interestingly, the Ganzfeld experiment, and hallucinations in heavy pure snowy landscapes, seem to show things happen when we are confronted with pure blank color, just as it can with sound.

 

[RMQualtrough]

At least that's how it seemed during trips or retroactively after. Is visual diversity what gives us a sense of space and positioning I wonder.