I want to use more Operators to control my scenes. Going to the next level, I have hope. For this particular situation, what I have is a massive scene, with trees, grass, forest pack, tons of stuff. Now what I need to do is adding some people, but I don't want to render the entire scene again.
I want to apply a shadow matte to everything except to those 3 or 4 models. In my mind it is easier to select everything and subtract those models and then apply the shadow matte.
My question is what parameter do I need to add to the Collection Operator for that to happen?