Generates a quarter of a corkscrew as a .map file to be opened in GtkRadiant.
The fact that there are so many different types of shingles that can be generated is confusing. The three types are: shingles, tiles, and cap. Shingles go along the inside wall of the corkscrew, much like shingles on the inside of a cylinder. Tiles go on the main surface of the corkscrew (the top) and may help prevent "bounching", especially when flipped upright and used as the wall of a loop. A cap goes on the outside wall of the corkscrew and is useful to prevent lemmings when the corkscrew is flipped upright to form a loop; the cap would then be on top of the loop.