The Red & Blue Passage is an area accessed by interacting with the clothed post on the Nail Board.
Features
This area, as the name suggests, has many intersecting pathways made of red and blue tiles. There are brown orbs with mouths floating around, smiling at Kubotsuki. Going all the way to the left of this map can lead to two different paths; one with a lamp that takes you to Floating Lamp World, another with a dancing picture frame that takes you to Dreadful Gallery. On the right side of the map, one can find a brown orb with a bloody orifice that takes you to Teratoma World.
Directions
Kubotsuki's Nexus → Nail Board → Red & Blue Passage
Gallery
Entrance to Teratoma World.
Entrance to Floating Lamp World.
Entrance to Dreadful Gallery.