Lunatic Fringe is the eleventh level and the second secret level that can be found in the episode Lunar Apocalypse of the game Duke Nukem 3D. This level can be reached via the secret exit on Dark Side.
Similar to High Times later in the game, this level exploits the unusual architecture of the Build engine to create the illusion of a non-Euclidean, 720-degree circle. Walking a full 360 degrees around the circular fringe on this level does not return the player to the starting location but instead to a totally different location. The level's name, which it shares with a Red Rider song, is a reference to this crazy-making mechanic.
It is possible to break the illusion by peaking through the window right beside the button in the central compartment. Although walking through the opening to the right of the button leads to one part of the outer fringe, the window to the left of the button leads directly to a completely different part of the outer fringe with the exit button.
A similar trick can be found at the very beginning of the level. By walking backwards through the door at the beginning of the level, it can be seen that the player emerges from a wall, not from a doorway.
There are no secrets on this level.
Easter Eggs Edit
- Use the "dnshowmap" cheat to enable the whole map under map view mode. Zoom out using the minus key on the keyboard, and on the edge of the map, you will find the letters "SUYT." The "dnclip" cheat will allow you to reach this area.
- The idea of a "720 degree circle" is probably inspired by Stephen Hawking's view of so-called spin ½ particles, like electrons or quarks, "that do not look the same if one turns them through just one revolution: you have to turn them through two complete revolutions!"
- ↑ Hawking, A brief history of time, 1988