Uhhhhh... Help? 2005-02-01 - By Vince Fortin
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Hi Eric,
Isn't it that old bug related to caching?
I'm pretty sure we're talking about the same thing here but as far as
I know it's been all sorted in 4.2. What version are you using?
The only workaround for this is to use the rendertree instead or turn
caching off straight...
Vincent
On Tue, 01 Feb 2005 16:49:24 -0800, Anthony Rossano
<arossano@(protected)> wrote:
> Yes - I see this all the time.
> BUT - it should be resolvable.
> 1) animate the alpha UP from 0 to 1 over the first few frames of life,
> then Down to 0 again very gradually, so the last frame doesn't have so
> much transperancy change.
> 2) Use a linear curve on that alpha - to avoid having a spline
> easein/out prob where the alpha dips negative.
>
> 3) Emit with more sub frame emission, so they don't come in in spurts.
> 4) Add variance on the life... and make the variance ont he variance on
> the life Gaussian.
>
> 5) if at all possible, think about dimming the color of the particle
> near the end of the life.
>
> This should all help. I hope.
> Let me know if it does not.
>
> And check out Alan Jone's excellent Genietail particle renderer - it's
> loads better.
> ATR
>
>
> Eric Lampi wrote:
>
> > OK so someone please tell me there is a fix for
> > this...
> >
> > Particles seem to have an issue regarding their alpha
> > channels. I get random pops on and off, as if I have
> > the transparency keyed Abs (in reality they're keyed
> > by age% so that they fade as they die, not everything
> > at the same time)
> >
> > Anyone else STILL experiencing this?
> >
> > I've had this happen in the past but I thought it was
> > resolved by now.
> >
> > Thanks in advance...
> >
> > Eric
> >
> > =====
> > Freelance 3-D Animator, F/X Artist, Particle Man
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