I just started using Particular this week and it's pretty awesome. I'm fairly newbish with After Effects as well, coming from a film background. I'm trying to create a motion trail effect, similar as the one based on the ipod motion trail tutorial found here:
However, I want to be able to control the line weight dynamically, so that, as the trail goes into a tight curve, it gets 'larger'. If that is not feasible, how about a random dynamic scale that gives it a nice organic variation, without having to key size attributes manually? I am not sure if this can be done using expressions for vector or whatnot, but maybe someone here can point me in the right direction!