Buhlman’s reality model explanation is a very simplified version with the goal to motivate his readers to start astral projection without being overwhelmed by the true complexity of the many layers of reality. It is an explanation to give his readers a basic idea but far away from a complete overview.
There are many many layers…
Here is an example of how a more complete reality layer model could look like (this is a simplified version of my understanding and also not complete):
The level that is above another level has also more power to completely change and influence that level. So for example, the highest level (Consciousness) can influence and has the power over all the levels under it.
A level that is under another level has the potential to influence the levels above it, but not the power to completely form and control it.
For example “Words” can have an influence on your Thoughts but not fully control them. While “Thoughts” have a influence AND total power over “Words”. This does not apply with all the layers in my simple graphic at the top, but I hope you get the idea…
Morphic Fields are at the Conceptual Level and usually have additional components of Astral and Etheric Energy (in order to sustain them and make them work in the Physical) as well as a component of Information from the Quantity Level (the additional instructions of the field).
All of this works, including the influence of the levels between each other back and forth, is because in the end, ALL of these levels are processed by one universal God/Source Consciousness that operates everything and that is everything.
All in all, there are probably hundreds of layers in total.
Physical matter as crystallised thought forms could be how physical matter looks like when viewed from a higher point of view in this hierarchy of levels.