This shader supports up to 8 "Anti-Lights" - they are essentially lights with negative intensity values, meaning they suck the light from an area, instead of illuminating it.
The shader supports colouring, texturing and normal-mapping.
If you use it to make anything cool, please comment with a link to the project page, or a video!
As with all the others, this shader will be continually updated as necessary, and comes with several example scenes.
*Important note*
To see dark-lights in edit mode, you will need to uncomment //[ExecuteInEditMode] in the Receiver class.