Void

In programming, void is used when declaring a function that does not return a value. void* is a pointer to such a function.

The void is the black space outside the world. It is an infinitely large area of nothingness that surrounds every map.

The map can occasionally share its inside space with the void causing an error known as a leak. Loading the map's compiled pointfile plots a course between this void and the closest entity in the map which can help patch leaks.

The void is not physical. It isn't a brush or entity but the lack of entities and brushes.^[Clarify]

By default, a clear only happens when the vieworigin is assumed to be in a "solid;" the void is marked as such.

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