[Sidefx-houdini-list] Flamethrower effect help?

Jens Martensson jempamartensson at gmail.com
Mon Aug 2 05:03:07 EDT 2010

Hi I saw your post on odforce last week.
Been to busy working, but I did a quick test yesterday.

I will post the file on odforce tonight .

I think much of the effect is in the motion.
Mine is far from perfect, but it's a start.

I use particles to drive volume all the time, so in this example
I have particles emitting fluid which has speed of 1 (arbitrary number) and
the I have particles with double 2 which blows thru
the fire to have that spitting effect.

Hope this will help a bit


2010/8/2 François Duchesneau <sidefx at trinix.ca>

> I cannot really help regarding Pyro but I'm about to create a fire
> explosion shot in slow motion and I will do my first R&D with particles
> with a Particle Fluid Surface followed by a deformation based on the
> normal. On this you apply a shader where the opacity is driven by the
> facing ratio. The smoke is actually the same simulation and surface as
> the fire but you use only the alpha in comp and tint it with a black color.
> You can have a look on a test I did at home. www.trinix.ca and go under
> the demo section to the fire skull.
> It may not be a good way to go for a flame thrower but it can give ideas
> maybe to complement your main effect or just the smoke etc. Maybe I'm
> wrong to take that path but the reason why I want to try it this way is
> to have more control. You can more easily shape the fire I think.
> François
> Raymond Chua wrote:
> > Hi guys,
> > Recently, I am trying to create a flamethrower effect in Houdini but I
> faced
> > a few issues.
> >
> > I am trying use pyro tools to create the effects and I have 2 questions
> for
> > now.
> > How do I get the flames to turn into smoke after a certain frames, rise
> up
> > in the air and vanish?
> >
> > I understand that the pryo solver uses a layer for fire and another for
> > smoke.
> >
> > Another question is that since my flamethrower effect is coming off from
> a
> > "gun", how to make it so that it looks like it is "shooting out"?
> >
> > Hopefully, someone can give me some assistance. Thanks! =)
> >
> > Regards,
> > Ray
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