So, I'm using Particular 1.5.1 and I'm trying to get the random seed to change, but can't seem to get it to work. I'm going into the Settings button, under the Settings subheader where you can then change the Emission Extras, Smokelet Shadows, etc. Under the dialog box for Random Seed, its default is set to zero. However, when I enter in a new number, the particles don't change their position. Am I doing something wrong? Do I have to be at the first emission point in the timeline and then change the seed there? Or.....???? Any help is much appreciated. I also posted this in the Trapcode forum, but thought I would also post it here since I'm on a deadline. Thanks all.