We have a 3D animation that we need to time particles to. We have 2 separate sets of particles we need to time. One set that happens at the 5 second mark of the animation and lasts for 2 seconds and one that happens at the 8 second mark of the animation and lasts for 3 seconds. And we want the animation to loop with it's particles. We're finding it impossible to do. We're currently trying to achieve this using the delay on the Tween function. The problem is that the delay function also sets the duration of the particle.