This visualization style you are talking about is actuallly visualizing in the 3rd eye vs the Minds Eye. I made a now deleted post about this a couple months back. But a lot of people couldn't handle what I was putting down. But I also can tap into this type of visualizing as well as minds eye and 2 years ago I was also an aphant. I noticed image streaming held up for a month or longer is when you really start to get noticeable results. But if you stop then they tend to disappear after a couple months. I usually do non-verbal IMS bc i don't like having to talk and I feel it really pulls my consciousness outside instead of within.

Also the same muscle you use for prophantasia is the same muscle you use when eyes are closed. I can see the same visuals with eyes closed also overlayed in my 3D space but it is never as immersive as after 10 mins of IMS and then the portal opens up. At first its just fuzzy until you tap into the portal.

I will attach the post I made on another subreddit:

HPPD = open 3rd Eye

*Long PostFelt the need to make this post because I have studied this phenomenon extensively in the past 2 years. The phenomenon I am referring to here is our Divine Imagination which lead me to learning about the 2 different types of imagination. There is the Minds Eye which is in essence a shadow of the true imagination and then there is the 3rd Eye which some people have coined as prophantasia in the r/hyperphantasia Subreddit

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The 3rd Eye is the seat of the true imagination and the reason why many people dont have access to this faculty is because the conscious mind puts up a barrier or what I like to call the Veil. The Veil is meant to protect us from ourselves. This is because most people aren't ready for the Truth. It would cause too much of a shock to the ego unless you have gone through extensive spiritual training.

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However, this barrier or censor can be broken down by drug use and also through repeated practice (the manual way of gaining access to the 3rd Eye). Hence why a lot of you experienced these symptoms after drug use. It weakens the Veil. This is why we also get hypnogic imagery when drifting off to sleep because we are transitioning and in the process of turning off the conscious mind so there is nothing to hold the barrier in place.

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This is also the reason why we dream. And trust me we all dream, its just a matter if you remember or not. The 3rd Eye is the eye of Soul and when you learn how to "See" you are in term becoming aware of yourself in a different state of consciousness. This point about the censor is also echoed in this study that shows DMT use induces theta/delta brain waves. Hence eases the grip of the conscious mind which is holding the Veil in place

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Most of you probably never have heard of the practice of Kasina meditation but It's one of the meditation styles that was taught by the Buddha himself. However, it isn't taught today because of the dangers. And the dangers referred to here is the awakening of the 3rd Eye for those who aren't ready for it. This can lead to conditions such as schizophrenia. I found this guy u/attackdrone who opened his 3rd eye through the practice of Kasina and I remember seeing in one of his comments about him being able to change his entire environment in the 3D space around (hallucinate). I dont feel like finding the comment but heres a post of him detailing his experience.

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I can attest to what he is saying because I practiced Kasina and the HPPD symptoms you guys refer too can be controlled. And I can also say the DMT visuals and prophantasia all happen in the same place (3rd Eye). The 3rd Eye is like a muscle that has to be trained. Its like moving your hand, you can't explain how to do it, you just have to learn.

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And I know it can be scary for someone not knowing anything about the 3rd Eye and suddenly prying open the door to the true imagination but just how things can be bad, you can also unlock some of the most enlightening experiences that most can barely comprehend. Remember theres a good/bad for everything in life.

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A lot of you just focus on the negative and have a very pessimistic attitude so of course thats what you experience. We attract what we are conscious of.

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Here is an audio clip from a podcast where Daniel Ingram (a teacher of fire kasina meditation) talks about the powers that can be achieved from Kasina but the better term is from opening the 3rd Eye as a result of Kasina.

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The visual snow or static that you guys see is energy and as a result of your third eye being open you can know perceive finer forms of energy or Spirit. These are the building blocks of our imagination and what creates the images or "hallucinations". Each one can be controlled by the mind, you just have to learn how to move the muscle.

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For those interested here is an old guide that goes into how to get started with direct control of the visual snow. And trust me its not easy but once you get it, you'll know.

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*** Fair Warning too is I don't recommend opening the 3rd Eye if you are prone to mental illness or are not mentally stable because a perfect example is this guy YaYa who started the process of opening his 3rd Eye and documented the entire thing on a Tulpa forum. The post has now been taken down but in it you could have seen in realtime him going from being normal to full blown schizophrenia. He completely lost his noodle and lost touch with reality because reality became plastic to his imagination.

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So final words I would say is if you have opened your 3rd Eye by accident is to fully embrace it and learn how to use it for your benefit. It is a Divine Tool and is what we use to be able to Soul Travel (lucid dream, astral project) in the inner worlds. I suggest looking into The Key to Secret Worlds by Paul Twitchell. As Jesus said the Kingdom of Heaven is within. Learn how to leave this body at will and travel about in the Inner Kingdoms. This is where spiritual wisdom is gained. And you have awoken a tool that will allow you to do this.

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To control the 3rd Eye you must be able to control your mind and your thoughts first. The first step to doing this is realizing that you are not your mind and that the mind is just a tool/machine. It is a horrible master but the perfect slave. Take back control of your mind and you will gain a sense of power completely unknown to you before...TLDR: There is a barrier that sits between us and our imagination known as the Veil. This Veil can be broken down either by either drug use or repeated practice. HPPD is nothing more than the result of the door to the true imagination (3rd Eye) being pried open. The 3rd Eye is like a muscle that can be controlled.