Interesting thoughts

Could the Egyptian concept of the soul(three souls) form the triquetra(form of winged sun)?

ka
ba
akh

Likewise, the
immortal/ethereal realm
mortal/physical realm
spirit/spiritual realm

or can say

heaven/dream
earth/reality
underworld/illusion

The definitions are not exactly what is meant.
Interestingly, it was said the body had to be remained intact (through mummification) for the akh to exist happily. As they say the 3 realms/souls have a type of movement to where they do not exist in the same time space at the same time. But the tripura does give hint that it does rarely.:P

Interesting how the sri yantra is called the shadow just like the plasma residue is the shadow of the electric field. Shiva lives in the wave envelope. Interesting could be sound related.
[link to en.wikipedia.org]

and looks like the tripura adds up to 9

The war-chariot designed for Shiva was different. The Earth or Prithvi1 became the chariot with the Sun and Moon its wheels2. Brahma3 was holding the reins. Mount Meru4 became the bow and the serpent Vasuki5 was the bow string. Vishnu was the arrow6, and Agni was the tip of the arrow7. Vayu was inside the feathers8 on rear of the arrow. All other Devas had their own places and forms in the chariot. Just as the cities aligned, when the Pushya nakshatra positioned appropriately, Lord Shiva was about to strung the mighty bow, the Pinaka with the arrow9, the Devas were overjoyed that Tripura was going to be destroyed because of them (because they were part of the war-chariot, without which Shiva cannot destroy).
[link to en.wikipedia.org]