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Need some help with a particle expression

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abie silva
Need some help with a particle expression
on Apr 9, 2010 at 3:05:45 pm

I have a grid of particles that I would like to have go from transparent to opaque and then back to transparent again, but not all at once; I'd like for it to happen to individual particles at different times. I know I can use the linstep function to do this, but I have no idea how to set the parameters.

ParticleTwinkle_ParticleShape.opacityPP = linstep();



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