AH mentions fractals in “episode” 4. Couldn’t resist sending this image.
The classic depiction of the Mandelbrot set fractal is just a projection of the 3D space onto a single 2D plane. Of course, rotating the set gives you different, sometimes wild projections. Couldn’t resist uploading one I use as the background on my computer screen.
If you are interested, free and easily searched online fractal viewers enable you to rotate and explore this different mind-space. Can’t help but think this would appeal to some lucid dreamers out there.