So, I have been practicing this for months, and I think I have finally simplified this down. Incase you are extremely confused right now, I am referring to this. If you don't want to read all of it, I am only going to be focusing on a few points of it; How to Create and How it Works (How Persistent Can It Really Be.)

Persistent Realms are self explanatory. They are dream environments which have persistence, meaning actions have consequences, there are laws and physics, and if you die, you don't come back. That makes things interesting. You must value your life, and not be too hasty. If you don't want to use caution and you want to have the freedom and dream control of your regular lucid dreams, than this isn't the guide for you. I do recommend you at least read on though, and see the things you can do. Persistent realms make lucid dreams feel even more like real life. This can be a bad thing and a good thing. I can explain that later though.


How to Create
This really isn't the easiest thing to do, unless, you use my way.
How Hyu Explains It:
At this point it is clear to me what the technique to create such a persistent realm must encompass:
1) Bypass the I know that creating a persistent realm must be extremely difficult. thought, create a new realm and access it.
2) Make yourself "know" that his is a persistent realm. You can go back whenever you want.

But you cannot just selectively remove ideas that are so deeply anchored within your mind and insert new ones.
That just doesn't work. You can't just decide to "know" something.
You can think about it, educate yourself on it, discuss it,
and eventually it might change. But you cannot consciously edit something you "know".
If you think about it, it happens all the time though. Your ideas, beliefs and even knowledge changes, in the blink of an eye.
It just happens.
And I argue that this process happens sub-consciously.
I also argue that you are able to interact with your sub-conscious in different ways when you are dreaming,
albeit in no way that I think anyone fully understands.

He makes a lot of good points in there, and it makes sense. Early in that post, he explained how he summons items. He knows that he wouldn't be anywhere without some kind of item on his person. He thought the process, and let the train of thought finish itself. He found the key, and continued on.

This process should be familiar to all of you, as it almost directly mimics the Door Method. You expect something to be on the other side of the door, so it is.

When I created my Persistent Realm, this became key. You have to think, but let the process finish itself.
(Incase you were wondering what my realm was, it's a realm similar to Avatar: The Last Airbender. It has completely different lore, but there are four nations and four elements.)

I can't really put into words how you do this. I love his example, and it's actually how I created my realm.
I breathe in deeply and exhale, whilst stretching to prepare myself for the task at hand.
I am amused by the realization that stretching a dream body makes little sense, but quickly focus on the task at hand again.
I try to relax myself as much as I can.
I imagine myself standing inside of a bubble containing the current dream.
A bubble created solely by my sub-conscious.
I need to push myself out of it in order to go to real worlds.

I find that this works WONDROUS. Fly around, and think to yourself that you will find the realm you are looking for. You will probably find that "bubble", and enter it.

What are the limitations on how persistent it really can be?
Well, in my realm I created an entire earth kingdom city within a few days. It's rather large, probably as large as Ba Sing Sei from the actual series, and I "remember" every single part of that city. If that's not persistent, I don't know what is.

Let me know your guy's thoughts on this. I will expand on this topic later on.