The cahes style is a particular type of building ornamentation. Though there are several variations, a typical cahes-style structure will be made of white or off-white material. Traditionally, this material was stone; a recent tax on stone exports has resulted in the development of a technique to make an economical plaster siding which appears the same as stone.

Cahes was developed in the now-abandoned settlement of Cahelles, but is now almost synonymous with the architecture of Brilliance; the cahes style is what lends Brilliance the title of ‘the white city.’