> The image exemplifies the popular internet aesthetic of “liminality”: the exploration of spaces that appear “in between,” that are uncanny and uncomfortable despite being mundane or familiar.

Liminal in the context of liminal dreaming has very different emotional connotations. Liminal dreaming is the state where you are beginning to fall asleep but are not quite there (hence liminal because you're on the border between awake and asleep). You can also experience it at the end of a sleep as you transition back into being awake. It's a flowing place where colors, shapes, and sounds keep morphing in very interesting and often beautiful ways. Unlike lucid dreaming there is no notion of being in control. Supposedly this was a secret to the creativity of Dali. He would sit in a chair with some keys in his hand and allow himself to drift off. When he fell asleep the keys would fall out of his hand, hit the floor, and the sound would wake him up. Then he would draw whatever he had been imagining during the liminal dreaming right there on the spot. Edison supposedly also had a similar trick. Supposedly. I have sometimes imagined some really beautiful (and catchy!) music but I've never been able to remember it in detail after waking.