Re: particle fading

["Adrian Wyer" <adrian(at)the-mill.com>]

cheers andy, the color isn't animated
there is no variance on the alpha
i have tried getting rid of the offset, and re-farmed the sequence,
i will find out in the morning if it worked....
other wise the gradiant age trick could work, but im thinking this is
something more fundamental....

to be honest i have seen this behaviour before, i can't remember how i
fixed it though... lol

a

adrian wyer
head of 3d
milltv
adrian(at)the-mill.com
www.the-mill.com
t: +44 (0)20 7287 4041
f: +44 (0)20 7915 0551

----- Original Message ----- 
From: "Andy Jones" <andy(at)thefront.com>
To: <XSI(at)softimage.com>
Sent: Friday, January 27, 2006 7:29 PM
Subject: Re: particle fading


> Three things:  First, there's a color animation reference and an alpha 
> animation reference.  Are they both set to age%?  Second, is there 
> variance on the alpha?  Third, if it's totally fubar, you could override 
> the particle alpha with a gradient node being driven by the particle age 
> scalar state.  The only main problem with this is that the GL preview 
> won't be accurate.
>
> -Andy
>
> Adrian Wyer wrote:
>
> > we have a scene with a particle system that starts spewing particles at 
> > frame 200
> > the particle op has a time offset of 200 frames so as not to calculate 
> > anything before frame 200
> >
> > the particle alpha is keyed at
> > frame 1 = 0
> > frame 10 = 0.5
> > frame 100 = 0
> >
> > so the particles should smoothly fade up, then smoothly fade out
> > the animation reference is set to age%
> >
> > what happens is the particles are working just fine, until frame 750, at 
> > which point they all fade out as one!
> >
> > then they all fade back up and carry on behaving as intended
> >
> > this is not desired behaviour, and i would like to not have to work all 
> > night to fix it!
> >
> > any ideas?
> >
> > a
> >
> > adrian wyer
> > head of 3d
> > milltv
> > adrian(at)the-mill.com
> > www.the-mill.com
> > t: +44 (0)20 7287 4041
> > f: +44 (0)20 7915 0551
> >
> >
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