If the above is true, then we can control where we are in the immaterial domains. I and my son have both found this to true. So, the next time you experience unpleasant phenomena on the immaterial domains, then try to just move to a higher layer there, where you will find more pleasant phenomena occurring.
This is absolutely true. I simply had a single thought of an entity such as the Buddha or Jesus Christ and the entire realm lit up in an instant - to be more accurate, "I" was transported into a different 'frequency' of sorts within just one thought movement. This has happened multiple times.
I have felt that it is very similar to meditation, where we meditate and suddenly our 'samskaras' grab hold of us (karma) and we lose lucidity and control, letting it take over our body, speech and mind. Then suddenly we 'realize' or 'wake up' even for the slightest moment, that Mara the demon has taken over - and that waking up allows a short period of control to which we turn to the next available samskara - if it is positive, we can immediately go to a higher realm.
I think this also highlights how important it is for us to build virtue and have good conduct. When we fill our mind with positive samskaras, then it is only inevitable that at death of our bodies, at minimum we go to bright, joyful realms like the deva realms. This might explain why the Buddha said brahmavihara meditation leads to a minimum of deva birth. I believe however that the key is as Jhanananda expressed, 24-7 lucidity, which allows one to go beyond birth and death, time and space, and lives, upon departing from the physical shell.
I was curious, as Jhanananda once expressed that the arupa-jhanas are in fact more of immaterial domains, aka ayatanas, or in chinese buddhism, called 'jing-jie' which translates as "worlds", "states" or "realms".
From what I know, people are able to enter the so-called OBEs when severely sick (departing from the body) or when consciously practicing OBE through astral-travel. Is it possible that the four immaterial states can be traversed by people who have not attained the faculties of jhanas? And that it is only because of the power of jhana factors that allows one's 'spiritual body' to have more 'lucidity' and control over its faculties, such as going to past-and-future, clairvoyance, clairaudience, etc?
In that case I might see why arahants have graduated levels towards Buddhahood. I think this might be what the 'Mahayana' schools talk about as the
Bodhisattva Bhumi stages, where the tenth and final stage is the dharmamegha or Cloud of Dharma, which is what Jhanananda describes as the Milky Way.