This Backrooms scene is created with a 'Backrooms' kit which I'll upload in a day or two.
The Kit contains .Blend models of each part of a the standard Backroom scene (carpet, ceiling, walls, columns & air vents) and can be used to create unlimited backrooms environments for use in Backrooms videos or whatever!
It will be a 'blend file.
The YouTube video link below shows a 360 degree of this model created in Blender:
https://www.youtube.com/watch?v=PfIRqhJSds8
If you can, please like and subscibe to my Youtube channel.
Models free to use for any purpose.