Fenestrated wall

Fenestrated walls are used as a kind of video surveillance utilized in Derse. They consist of a wall panel made up of four separate windows used to show events elsewhere - the Walls can be broken, and entered. Four fenestrated walls are arranged in a square to form a "Cubicle of Vigilance".

The Archargent Jack Noir's fourth fenestrated wall was stolen, presumably by Grandpa, much to his intense annoyance. The fourth wall was later located (and broken) to show MSPA author Andrew Hussie for a shameless self-insertion into the story as well as a verbose recap of events thus far. The fourth wall was then taken by Jade as her future self advised via Karkat. She then used it to escape the scratched session with John, Skaia, and the kids' four planets.