The Cognitive Realm is the world of thought and perception. It is known locally on Roshar as Shadesmar, though at least some academics of Silverlight have taken to using the term to refer to the entire Realm. A planet's reflection in the Cognitive Realm is referred to as a subastral. The nature and appearance of objects in this Realm are shaped by the views of people and even the objects themselves. The environment itself changes from one world to the next, often exhibiting features characteristic of that world. Investiture, including that within souls, glows visibly within the Cognitive Realm.