I am trying to use Niagara to draw tail light trails for my vehicle. I have successfully made the ribbon emitter, but the ribbon is drawn whenever the car is accelerating which is not the desired effect:
I would like the ribbon to only be drawn if the emitter moves relative to the camera (in screen-space). Is there any way to accomplish this?
What I want is this:
No trail when car is stable.
Trails when emitters move relative to camera.