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Fading trails for volume


JDee

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Hi

Can you guys give me an idea of cheap way to reproduce a fading trails inside a volumes ?
Can't find anything useful in simple trail sop like numbers of copies or something to work with in vop.
I understand it's simply multiplying function or dividing number of copies by number of each , but can't get anything working at this moment.

VolTrail.jpg

VolTrail.hipnc

Edited by JDee
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Create an id attrib on points, trail the points, run a for each over each id and you can get a u attrib by @density = chramp("fade",fit(@ptnum,0,npoints(0),0,1));, then create a fluid source and create a density volume by stamping points. 

You could also use just points and stamp the points and then use the motion blur tab in the fluid source but the first method I mentioned gives you more control.

Hope this helps,

-Tighe

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