Gold mine of a post thanks for sharing your experiences.
when you tell dream characters they aren’t real they panic and scream in fear
This one is particularly interesting, do you have any further details like what exactly they scream or why this might happen. Are dream characters psudo-sentient consciousnesses like tulpas that literally have an existential crisis when you point out the nature of their reality?
Have you ever tried to render and touch a highly complex mathematical/abstract object like the Mandelbrot set? This may be a good way to test just how much ‘resolution’ your brain can render since fractals contain infinite detail.