func_nav_stairs_toggle
... 
func_nav_stairs_toggle is a brush entity available in 
Left 4 Dead. It will add or remove the 'STAIRS' attribute from all nav areas that overlap the brush.
Keyvalues
- Initial Setting
(???)<choices> -
- 0 : Leave Default Value
- 1 : Add Attribute
- -1 : Remove Attribute
Targetname:
- Name
(targetname)<string> - The targetname that other entities refer to this entity by.
Inputs
AddStairsAttribute- Adds the STAIRS attribute to overlapping nav areas
RemoveStairsAttribute- Removes the STAIRS attribute from overlapping nav areas
