Fourth Density Space/Time

[anagogy]

And about STS entities? I wondering if they inhabit the lower and middle astral planes? Because they don't work with the green ray appropriately.

That is absolutely, and exquisitely, correct my good sir. You see, when you become dis-incarnate (I believe the technical term is "croak" :D ), no one forces you to go "back home" to the "The Light". You are strongly encouraged, i.e. a prominent sales job is done, but no one is forced. Never forced. And so beings of the darker variety, or sometimes confused, emotionally attached, and fearful souls afraid of some kind of divine judgment, simply elect to not go home after death, and stay in the lower planes, intensifying their negative learning, and then eventually reincarnate as long as they are choosing their circumstances in full consciousness of the ramifications of their choice. With every increase in density, they become better able to utilize these planes, even the lower ones. Lower doesn't mean "less  useful", though, people often wrongly come to this conclusion. And it doesn't even necessarily mean "negative" either, though it is true the negative holds dominion over the lower planes, just as the positive prevails with ease in the higher planes. There are many positive aspects to the lower planes. For example, the lower astral contains all your "personal memories". It would not be possible to have a coherent ego personality without the lower astral orange ray field.

This is the reason I was confounding the fourth density as and etheric world. Thanks a lot my brother!

Most welcome my friend!