Cool backroom idea(not mine)
(This idea comes from a French YouTuber. It explained a scenario about what would happen if the Backrooms existed IRL. It’s a really good video. This is not my concept, although I’ll try to explain it and expand a little bit in my own words.)
The idea is that the Backrooms we all know are quite modern in appearance. Wallpaper, carpet, and artificial light are all recent creations that humans didn’t have for a long time until recent years.
So how would the Backrooms look, assuming they always existed and were accessible to unlucky humans?
Hug was chasing a deer with his friend. Ready to jump out of the bush he and his friend Regg were hiding in, he noclips. He landed in what seemed to be an endless cave system. (I assume the YouTuber’s idea was that caves would be the closest thing to the Backrooms look of the first level.)
Then, a couple centuries later, a slave running away from dogs trying to maul him accidentally trips on an exposed root and noclips. He lands in what seems to be endless rooms with red carpet, white walls, and bougies that illuminate the rooms (rooms that would be found in a castle).
I find this concept really good. The Backrooms practically adapt over time.