Hi!
I have the following problem and hope that someone can help me.
I have different objects in a scene and they change visibility during an animation. Now I want to create particles which should flow out of the objects everytime an object gets visible and stop it everytime it gets invisible. How can I do this?
one idea is to wire Node’s Visibility controller and Birth’s rate controller. when the node visibility is 0.0 the rate is 0.0, when the visibility is 1.0 the rate is maximum.
another use the visibility controller as particles material opacity.
the solution depends on what you want to get when the node is invisible. Make particles invisible or stop emitting of particles.
another idea is to use Script Test (or Birth Script) in combination with Delete Operator. which will select all particles born when the node was invisible.
I would probably start with the first method.