[Sidefx-houdini-list] 'Invisible In Reflections' on Houdini

Peter Bowmar pbowmar at gmail.com
Fri Aug 17 03:00:58 EDT 2007


Yes, but you have to make a custom shader that detects if the ray is a
primary or secondary (raytraced) ray. I don't have Houdini open right
now, I can't remember what the VOP is called to do this...

Cheers

Peter B

On 17/08/07, Chae Yim <chyim72 at gmail.com> wrote:
> Is there any stuff can disappear reflection, refraction and shadow only in
> reytraced ray???
>
>
> On 8/17/07, Peter Bowmar <pbowmar at gmail.com> wrote:
> >
> > It's called "phantom" in Houdini, on an Object. Unfortunately, you
> > can't specify Shadow, Reflection and Refraction separately, which is a
> > long-standing limitation. When you turn on Phantom, that object will
> > only appear in raytraced rays which could be reflections, refractions
> > and shadows.
> >
> > Cheers,
> >
> > Peter B
> >
> > On 17/08/07, Chae Yim <chyim72 at gmail.com> wrote:
> > > Hi Everyone~
> > >
> > > I have a big cubic room and have lots of small cubics in there.
> > > the small cubics have phong shader to reflect only the colors of the
> > cubic
> > > room.
> > > There's problem here. the smll cubics also reflect each other because
> > there
> > > are lots of small cubics in the cubic room.
> > >
> > > in Maya, I can use Render Stats 'Visible In Reflections' to prevent
> > > reflections of the small cubics.
> > > But.. I don't know what can I do in Houdini...
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