Granular Animation:
Before we discuss granular strings, it is important to touch on the basic concept of granular animation, a spellfire practice unique to the world of Circlaria.
Granular animation is defined as "when a form, be it human, animal, or inanimate object, is transformed by deep spellfire into its separated but condensed molecules. It is also noted that such molecules are separated and connected by special spellfire bonds known as nodules."
Static Granular Animation is the placement of real-world objects and beings in a realistic environment within a granular plane, which is similar to a dymensional plane except it involves full-body immersion. Dynamic Granular Animation is the placement of real-world objects or living beings in an unrealistic environment within the said granular plane; and the said objects and beings have alterations made to themselves, with said alterations existing only in the granular plane itself, that enable it to function in the said unrealistic environment. For example, a Third Level Society Member will immerse themselves into the Arturian Realm, a perfect example of a Dynamic Granular Plane, in the form of his or her avatar, a perfect example of said alteration.
Outside of the Third Level Society and the Library of Circlaria, Static Granular Animation is the most commonly used type of granular animation, especially with maritime states, which are nations residing and governing themselves solely from their sea vessels and piers at numerous ports. Granular plane storage here, as with dynamic granular planes, is in chip format. This not only saves on space and financial costs in terms of transit and trade of goods, it also increases secure living space for those citizens of said maritime states.
If there is any drawback to granular planes, it is that granular plane stability must always be maintained. A granular plane collapse forcibly thrusts all objects and living beings in that plane out into the real world; and this can have dangerous consequences because such a forceful "explosion" is violent and can cause injury and death. However, maintaining a granular plane costs very little and requires a very little effort. So the risk of such a catastrophe is small, small enough that granular planes are used in widespread fashion by maritime states, land-based governments, and countless private businesses.
Granular Strings:
So now we finally arrive to the concept of granular strings. Granular strings are like granular planes with two exceptions: first, they are literally stored on strings that can run up to many miles if necessary; second, the space inside a granular string is literally a tunnel.
Granular strings serve a very basic purpose of providing a tunnel of transportation between two places. These two places could be two granular planes, two real-world places, or a granular plane and a real-world place. Said tunnel can be one of many forms, including simply a walking path, a place for cars and trains to go through, or even a place for gyroplanes to fly through at low speeds.
Granular strings are not as common today as they were in the past. Some notable examples, however, include the one in the 1240s laid by Darius Weller at Cabotton University, which included a rail cart that also served as an elevator. This was discovered by Daniel Carter and was eventually de-commissioned. Another one was laid by Ceri Mains in the 1280s. This one connected her granular plane in her hiding spot in a remote Acrean town, and ran to the Circlarian Coast. This route was completely underwater and served as a route for secret submarines to exit her granular plane and sail to Middle Remikra for various missions.