Backrooms + portal - This is a Level 0 Backrooms.
The map turned out to be very, very huge, it has 29 rooms in each room == about 1000 items so the whole building will consist of 31,000 thousand items (In the rooms == about 1200 objects). Therefore, this card is not recommended for weak PCs, but if you decide to download it, do it at your own risk.
When loading the map, many complained that there are a lot of mods, I hasten to console you, there is only 1 mod and this is Accurate Resize & Position, and the rest are my maps.
Here you can find a lot of interesting things.
The map was made based on the videos: Kane Pixels
This contraption requires the following mods: