I've created a "flicker" on my particles using a Particle Curve which
turns off and on in the 'alpha curve'.  This works until I plugin an image
into the 'particle input', at this point the Particle Curve has no effect.
 In addition the particles re-distribute so its a completely different
configuration.

How do I "flicker" particles with an image input ?  As a work around I
wanted to simply use a version of the default 'camera facing polys'  and
multiply them against a version with the image input.  But since they
re-distribute their locations are completely off.

and for the record, the user guide single mention of this bug, or lack of
functionality... could be better conveyed then current :

Note:
If you’re using an image or a 3D object as your ParticleEmitter’s particle
input, the ParticleCurve might not alter the colors of the particles as
expected.

thx,
Ari
Blue Sky

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