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{{lang|Void}}[[Category:Glossary]]
:''In [[:Category:Programming|programming]], <code>void</code> is used when declaring a function that does not return a value. <code>void*</code> 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. It is, quite literally, void of any solid objects. If you noclip outside of the level bounds, you will fall forever.

{{warning|When viewing the void from inside the map, the [[w:backbuffer|backbuffer]] will not be cleared with black. This causes the [[w:Hall of mirrors effect#.22Hall of mirrors.22 effect|HoM effect]] to appear. The pixels where nothing is drawn the next frame will contain what was drawn to them in the past.}}

{{warning|[[w:Video post-processing|Post processing effects]] like filmgrain, HDR (bloom) and motionblur will indefinitely add their output to the backbuffer, which can result in a solid color or random patterns where the backbuffer is not refreshed properly.}}

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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