This may be the realest thing I ever say. The Universe may be someone's dream.
Consider the pictures on your computer screen. There is no man or woman inside the monitor. They are merely light sources lit in a pattern that your brain interprets as images, much like Christmas lights that resemble a deer. The display is fed that pattern via digital signals. The digital signals were produced in your display driver when you ran the program.
The input to the program was provided by a human (coder) and then converted into machine language via a compiler. The coder could be inspired by anything, from things in the physical realm (trees, birds, etc) or from things in the non-physical realm.
What makes you think that the real-life is any more real? Everything we perceive might be that way because we perceive it that way. How are shapes clouds mere illusions? Can’t it be peer-reviewed? Everyone would see the same illusion. Perhaps, matter is matter because we defined it that way. And air is air because we defined it that way. The desk is the desk. Right next to it is empty air. Why? Just because we can put our hands through empty air, not through the desk? Perhaps, it is the property of your hand and not of air and wood. Xrays can probably go through both.
The physical world is likely an illusion, no more real than a simulator game in which you pick a character. All physicality in the game is nothing but patterns of light bulbs. Real alone is the source code, which is just a dream of the creator. You enjoy the game so long you think the simulation is real. Things change when you see it for what it is-- lines of code.
Consider how the brain processes music. The source code is a set of frequencies. The ear acts as a compiler. It converts the frequencies into electrical signals (machine-readable code). The brain then projects the signals onto a screen. We find a pattern in it and call it music, no different from finding shapes in the clouds. The physical universe is, thus, a projection of the brain. The reality is the source code or that which is reduced to source code when a coder molds into a form the unstructured, the unbound, the abstract.
The good news is the source code is decentralized. Not only can you process the source code to watch the dream of physicality, but you can also generate the source code. You can also make the sound, sing the music, and draw the image. You, too, can be the coder. You, too, can externalize the unbound, the unstructured, and the unknown.