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particle trails fading


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sorry for the dumb question, but I couldn't find an answer

I have a pop sim with some points, and I'm trailing them with the trail/add combo, it's all good but I can't find a way to map Alpha or color to the length of the trail to let the trail fade away, any idea?



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you could use a foreach primitive loop with an attribwrangle inside @Alpha = 1-(@ptnum/float(@numpt));

edit: of course from there you can use ramps and w/e to shape the falloff as you need

Edited by 3dome
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