Sorry for the newbie question but I spent a lot of time on it today and for some reason I just can't get it to work.
I want it so that when a 'spotlight' is overlapping a 'hidden' object, the portion of the 'hidden' object that is overlapping the 'spotlight' will be revealed. I want the 'spotlight' object to be invisible too, it will only be used to reveal 'hidden' objects (which are also invisible until the spotlight is on them).
Additionally I also wanted to do the opposite - so 'hidden' objects are visible but become invisible when overlapping the 'spotlight'.
Thanks in advance for anyone who can help my confused brain!