Light/Object Exclusion

What is the process for excluding lights form objects and the other way around for lighting setups in a scene where you want more control as to what lights effect what objects etc.

drop down the advanced settings under each light/object and you can set what channels they affect/are affected by.

Thanks.

So the next question is, is there a way to add more channels?

By the way it appears the object has to be set to moveable to switch channels.