particle trails

Date : Fri, 27 Apr 2007 14:50:24 -0400
To : xsi(at)Softimage.COM
From : "Ajit Menon" <xsiajit(at)gmail.com>
Subject : particle trails
Does anyone know of a shader/ technique to render particle positional data?
I was recently on a job where I had to create comet-like paticle trails from a spheroid object, but the nature of the emission was such that I needed the secondary emission (via an event) to create the trail... and as far as I know, event emissions don't support sub-frame emssion... hence, however much I pumped up my rate/ tried to vary spread and inheritance, I would always get some form of a gap in the trails... and the idea was to try to create smooth, pretty trails like the ones we see in a windows (or itunes) visualizer.
Then I came across this site which indicates a renderman technique to render positional data:
 
Seems like a nice way to go and I was wondering if anyone had tried something like this or better still, just knows the sytem better than I do... (then again, maybe it's already in the new upcoming XSI p-system?)
 
Cheers!!!

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