The thing that introduced me to the aesthetics of liminal spaces was a video about the DOOM mod "MyHouse.WAD"[0], it's a technical fascination as much as it is an aesthetic one. There is no mention of it in the article, despite 18M views on YouTube. It was inspired by the novel House of Leaves[1], released in 2000, which "redefined modern horror".

I think that aesthetic follows a natural progression from creepypasta[2], mixed with some nostalgia for the eeriness playing Resident Evil-type of games as a kid, the satisfying feeling to watch empires collapse, going nowhere yet being nowhere, and the constant desire of the internet to long for niche cultures.

[0]: https://www.youtube.com/watch?v=5wAo54DHDY0

[1]: https://en.wikipedia.org/wiki/House_of_Leaves#Legacy

[2]: https://en.wikipedia.org/wiki/Creepypasta