Re: Resending Particles with transparency 2003-12-15 - By pmiinalainen
Back
Yep, and if you align two plane objects with transparency maps, you
get the same problem. So, it's not the particle system. It's
combination of carrara's material system and rendering engine, i
think.
petteri
> > with light through transparency checked and full ray tracing
selected I
> > can still see a rectangle when the particle lays flat on the
infinite
> > plain used as the ground surface.
> >
> > The only thing that worked was to raise the ground plane up
higher, so
> > that the particles passed clear through it before laying flat.
> >
> > DaleP
>
> I don't have the Snow Flake example you mentioned but I created a
Carrara 3
> scene with an infinite plane, a "rain" particle emitter and a
transparent
> shader on the particles. I then adjusted the Renderer to
have "Light
> Through Transparency" enabled. To my surprise, the particles are
> transparent until they come to rest on the infinite plane. At that
point
> they, or possibly their shadows, appear to stop following the rules
of
> transparency.
>
> Ouch... that was very observant of you... good spot!
>
> However, I found that if I moved the particle emitter UP a bit
above the
> ground that the problem went away. I used emitter z = (emitter
height / 2 +
> 0.1) which is slightly different that what you did since the
particles come
> to rest just above the ground. This workaround still allows the
particles
> to visibly pile up.
>
> Michael
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