Reality we perceive is a sequence of interactions produced by a collapsed chaos

I will use word 'interaction' instead of 'observation'.

We are very limited by language we use, so picking terms we use to describe certain phenomena is very important. We can't always pick the best one, some things can't be easily described. That's why we have abstract tools like math to approach this.

Observation happens and ends. Interaction can lead to another interaction, leaving more degrees of freedom and possible states.

I imagine underlying fields being and interacting in such way that it defines quantum properties of particles and their further interactions.

Everything is chaos, it just depends on which side of chaos you happen to be.

When particle interacts with something else (other particle) fields produce interaction based on previously collapsed chaos, other interactions follow further collapsing chaos in a tree (branching like) structure.

What we describe as our reality is a result of a sequence on interactions, a collapse of infinite probabilities into a single sequence as governed by underlying structure of fields.

When you look through the window what you see is what is one of infinite number of possible realities. You see the one that is allowed by underlying quantum field structure.

Good question

Those are higher level triggers affecting visual cortex.

Ultimately in order to perceive reality visually, photon needs to interact with your eye machinery (again on quantum level) resulting in nerve impulses being sent to your visual cortex, which decodes and interprets visual signals.

Hallucinogens mess with the chemistry of the brain affecting how it interprets reality.

Although those are higher level triggers they do not bypass quantum part, different reality gets created due to different chemistry in the synapses of the brain.

To conclude, event when you are hallucinating you are experiencing reality but in a messed up way.

I enjoy life more when I figure out stuff like this.

I think this goes much deeper, it tries to explain randomness in quantum realm. That's interesting thing to think about. What I say is, ok there is randomness, and you have these quantum behaviors of particles, how do you end up perceiving reality. I think that every bit of reality is one possible branch of random choices made according to structure and constraints of quantum fields. I would say that different fields are like funnels for degrees of freedom of quantum interactions.

I think the key to answering your question is to try to explain space which is very hard with our human evolved intuition.

We acquired so strong intuition about space, edges and boundaries. I tend to think that space we have available in the universe is again result of current state and degrees of freedom in which inherent randomness can be channeled.

It also has memory in quantum fields, that's why we don't collapse into singularity all the time.

Also I think that inherent randomness is unbounded meaning that it can produce space as long as it is possible due to quantum field structure and properties we happen to have.

Other quantum field configurations might have different smaller or bigger universes, but I think they all feed on the same source of inherent randomness.

Why I think there are other universes, well simply because evolution as a process has proven to be very efficient in finding solutions in a large search space, not only in biology. Thus quantum field structures might be a result of many evolutionary iterations even before time we know began. Majority of which probably doesn't allow for a Universe like ours, some Universes might got even luckier who knows :)