Plane theory

Plane theory is a field of study pertaining to the nature of the Plane or Planes of Existence. It attempts to explain the nature of the various Planes that appear to exist, as well as the relationships between these.

In academic discussion, Plane theory almost always refers to discussions on the nature of Magic -- specifically, whether Magic originates in the Material Plane, and, if it does not, which specific or theorized plane gives rise to Magic.

Single plane theory
Magical single plane theory postulates that Magic arises from the Material Plane itself. Perhaps its most important conclusion, the premises of Single plane theory, if accepted, postulate that an observer can, under appropriate conditions, perceive and interact with the entirety of the Universe. This presents the hopeful idea that, at some point in the future, the academia will be able to grasp the true nature of Magic.

Its name is somewhat improper, as most adherents of Single plane theory recognize other planes of existence as also existing: for example, the Abyss, or the Spiritual Plane.

Compound plane theory
Magical compound plane theory is a faction of Single plane theory that postulates that, although Magic originates from the Material Plane, the Material Plane is subdivided into a compound number of perceptions and realities, which may be unavailable to an observer, even with total freedom of conditions. These are known as Demiplanes.

Compound plane theory theoretically helps to explain why true knowledge of the nature and characteristics of Magic appears to be inaccessible to the denizens of the Material Plane.

Multiple plane theory
Magical multiple plane theory postulates that Magic arises from a wholly different plane of existence than the Material Plane. It was developed recently by Moras Gleckstett, and is currently the norm among academia.

Multiple plane theory and Compound plane theory are often confused for each other. Compound plane theory argues that Magic arises from a Demiplane of the Material Plane; meanwhile, Multiple plane theory asserts that Magic arises from a wholly different plane.

Dimensional plane theory
Dimensional plane theory postulates that Magic arises from a number of planes tangential to the Dimensions that an observer is able to perceive. For this reason, the rise of Magic from a set of planes is Relative, which its adherents suggest is why some spellcasters can be so much more powerful than others. Dimensional plane theory is also known as Relative plane theory. A being of extraordinary intelligence and insight, for example, will be able to perceive and interact with more Planes of Existence than an animal or a creature, for which reason he or she will be able to generate more powerful magical effects.

Multi-dimensional plane theory
Multi-dimensional plane theory specifically states that any observer must be able to perceive at least three different dimensions if it is to be regarded as a valid observer in Dimensional plane theory. This is known as the Fundamental Theorem of Multi-dimensional plane theory, and its ramifications are extensive, as it allows a far more concrete understanding of Dimensional plane theory. Nonetheless, this Theorem is attacked by many adherents of Dimensional plane theory.