The Ashtray Maze is an elaborate maze located in the upper Research Sector in the Oldest House. Created by the Ashtray Object of Power, the maze is designed to prevent unauthorized persons from accessing the Dimensional Research laboratory and the Hedron chamber. However, the maze can be navigated with the aid of Ahti's cassette player. The Ashtray Maze generated by the OoP of the same name permits only the one whom is binded to the OoP (and those they designate) to pass through the maze. Other individuals attempting to traverse the maze presumably become lost within, or in the case of Jesse, prior to obtaining Ahti's cassette player, turn around an only able to exit where they entered. It is known that there are civilains lost in the maze from prior to collection of the Ashtray by the FBC. The Ashtray OoP is binded to Director Trench, though it is not made clear what effects his death has on this binding. It is possible that Jesse's initial attempt to traverse the maze returned her to the entrance because of Trench's death or because she had taken over as director. Hiss are encountered in the maze, but they are not observed attempting to traverse it rather than to attack Jesse when she traverses with Ahti's player. However, the maze, in several instances, prevents the hiss from being able to reach Jesse. This indicates that the maze also somewhat protects those with traversal priviledges.
It is not fully clear whether Ahti was given permission by Trench to traverse, whether Ahti's cassette player convey's this or whether some supernatural ability inherent to Ahti allows it. It is likely one of the two latter considering the Jainitor Complaint indicating surprize by researchers at his ability to traverse and that he was able to convey this ability to Jesse. However, this is not definitive and it is possible that Trech gave Ahti maze priviledges without making others aware and that Jesse's traversal abilities are related to some combination of Trench's death, her taking over as director and/or supernatural aspects of Ahti/his cassette player. It is also possible that the means to convey traversal priviledges to Ahti by Trench was the cassette player. This is speculation.
The first traversal by the player as Jesse allows the player fully experiences the maze. Subsequent traversals (which can be in either direction) teleport the player to near the end and imply the experience.