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

Rangi Sutton rangi at kanuka.com.au
Fri Aug 17 03:08:30 EDT 2007


Chae Yim wrote:
> Is there any stuff can disappear reflection, refraction and shadow only in
> reytraced ray???
>   
The "scope" string parameter in the raytrace vop allows you to specify 
what objects are included in the trace. You'll need to be building your 
own shader in vops though.

Cheers,
r.



> 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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