Effector control applied where people pass.

How can I make the petals spread with Cloner scatter only where people pass?
When the movement of the person is a black and white mask, I tried Image Effector, but when the person disappears, the petals return.
I want it to just go away and become nothing.
In the case of xy numerical control with a sensor, the petals return to their original positions when they pass in the same way.

It’s difficult to give much advice without a project or visual reference, I would say your best bet is probably to control the image itself before it goes into the image effector. if you want the areas from the image to stay active, even after the image has moved away, frame feedback could probably do that.

– Ryan