I’m looking for the same feature.
 
Does it exist? Were you able to find a solution? 

Hey, Don\\\’t remember exactly but at the time of the question i was trying to inverse an explosion or something similar…and there is a time feature in the main stardust panel : i have been able to do exactly what i wanted with this parameter…just look a bit, if you don\\\’t find it, i will look at it. (sorry i am not on my computer with stardust actualy 😉 ) gluck !