info_lighting_relative
This entity is Obsolete. Its use is discouraged, and it may only exist/function in older engine branches.
info_lighting_relative is a point entity available in all 
Source games before 
Left 4 Dead. An entity that allows a model to be lit from a different light origin without affecting the environment around the model. Great for lighting up trees with many lights or doing manual light correction. It is used in d1_trainstation_01, where inside the train car Gordon encounters G-Man.
Deprecated by LightingOrigin keyvalue and SetLightingOrigin input for point entities (these however are not in Valve's FGD by default), use those instead, as they can accept any entity as a lighting origin.
Keyvalues
- Lighting Landmark
(LightingLandmark)<targetname> - Entity at which the reference origin is contained. If empty, the info_lighting_relative's origin will be used.
