View source for Func null

{{CD|CNullEntity|file1=[https://github.com/mapbase-source/source-sdk-2013/blob/master/sp/src/game/server/subs.cpp subs.cpp]|nolink=1}}
{{this is a|brush entity|name=func_null|game=Mapbase}} It is a brush version of of {{ent|info_null}}. This can be used for creating [[texlight]]s that don't have a visible brush in-game, such as for prop-based lights or accentuating lighting coming in from a window.

Because this entity isn't removed on compile, it still counts toward the [[edict]] limit for a split second until removed on map spawn. 
{{ModernCodenote|This entity uses the same C++ class as info_null. As such, the same behavior can be achieved in any game simply by manually setting a brush entity's classname to info_null.
{{note|Hammer will strip brushes from entities which are defined in the FGD as point entities. It also does not allow a point entity and brush entity to share the same classname, as it will only use the most recently defined version. This be circumvented by using {{teamspen}} [[comp_kv_setter]] to change the classname from func_null to info_null.}}
Alternatively, add a func_null [[FGD]] entry to base.fgd; it will spit out an error in the console when loading the map, but will otherwise be ignored by the game, and will never count as an edict, unlike info_null.}}
{{AltNames|name1=[[info_null]]}}

==Keyvalues==
{{KV Origin}}
{{KV Targetname null}}
{{minititle|Internal keyvalues used by [[VRAD]]}}
{{KV|Shadows|intn=vrad_brush_cast_shadows|boolean|Determines if this entity will cast [[lightmap]] shadows.
|since={{src07}}}}

==FGD entry==
If using func_null outside of Mapbase, add this FGD entry to the end of [[base.fgd]]:
<source lang=c>
@SolidClass base(Origin) = func_null : 
	"A nonexistent entity that gets ignored by the game (will cause an error in the console, but this can be ignored." 
	+ "Useful for invisible texlights, such as those appearing to be cast by props or which accentuate the light coming in through a window."
[
	targetname(target_source) : "Name" : : "Name to use if this is a target for lighting calculations"
	vrad_brush_cast_shadows(choices) : "Cast Baked Shadows" : 0 : "Set this if this brush casts lightmap shadows." =
	[
		0 : "No"
		1 : "Yes"
	]
]
</source>