[Sidefx-houdini-list] Mixing sss and refraction. Ouch.

Christopher Stewart stonesoupdigital at gmail.com
Tue Aug 9 15:49:45 EDT 2011


Can't wait to get home and try this. It will mean I can render higher than
sd :-)

Thanks Peter!
On 2011-08-09 10:44 AM, "Peter Bowmar" <pbowmar at gmail.com> wrote:
> Hi Christopher,
>
> Actually, it should be fine but there is a trick!
>
> For reasons best answered by SESI, they leave turned off and unexposed
> a critical parameter for SSS.
>
> In the SHOP that has the SSS, try this:
>
> Dive inside, find the Surface Model VOP. RMB on it's icon and select
> Allow Editing of Contents.
> Dive inside the Surface Model, find the "if2" VOP that's inside the
> grey SSS network box. Dive inside.
> On the Physical SSS node, turn on Optimize Secondary Rays for both
> Single and Multi scattering.
>
> Now try rendering, you may find it finishes :)
>
> Cheers,
>
> Peter B
>
>
> On 9 August 2011 10:07, Christopher Stewart <stonesoupdigital at gmail.com>
wrote:
>> Well, that'll learn me.
>>
>> In a rush to get a bit of my "learning Houdini" project out for
>> SIGGRAPH,  I plugged in everything and just hit "go". Assuming that,
>> if I waited long enough, brute CPU power would get me the frames I
>> needed. Alas, it was not to be so.
>>
>> http://www.vimeo.com/27492063
>>
>> When the pasta hits the water, all progress ceases. Electrons stopped
>> spinning, the birds hang motionless in mid-air. Well, the render
>> didn't go any further anyway.
>>
>> I could still get a preview render to kick out a visual, but any sort
>> of final just never stopped rendering. Turning off SSS cleared up the
>> issue.
>>
>> Any suggestions to get around this? I'll be involving the pasta with
>> more refractive fluids later in the sequence. I was also considering
>> making the pot glass and taking a stab at pasta swirling in the
>> boiling water...
>>
>> Thanks!
>>
>> Christopher
>>
>> ps. cv/reel at stonesoupdigital.com. I'm on the lookout for an entry
>> level Houdini position!
>>
>>
>> --
>> ----
>> Christopher Stewart
>> Vancouver, BC
>> 3D | VFX | IT
>> _______________________________________________
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>>
>
>
>
> --
> Cheers,
>
> Peter B
>
> --No, I am not on Facebook.
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