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In article <MPG.1797f33af91f8e37989b84@news.povray.org>,
Jamie Davison <jam### [at] ntlworld com> wrote:
> Hmm... To really slow things down, would there be any way to use the
> trick to simulate variable internal IOR, however crudely?
>
> It would probably require an obscenely high max_trace_level though.
You can, and it does. It can get very slow.
> And i can't remember if you can apply a pattern to the surface iro or
> not, as I't sbeen a while since I played with POV.
You can't any more, that was removed in 3.1 because it didn't really
make any sense. Earlier versions had ior in the finish block, so you
could use a texture_map, 3.1 and 3.5 have it in the interior block.
However, you could apply a normal to the refracting layers if all you
want is to introduce some irregularities.
--
Christopher James Huff <chr### [at] maccom>
POV-Ray TAG e-mail: chr### [at] tagpovrayorg
TAG web site: http://tag.povray.org/
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Jamie Davison wrote:
> Hmm... To really slow things down, would there be any way to use the
> trick to simulate variable internal IOR, however crudely?
The problem I had when using ior of any kind on nested objects is that POV goes on
vacation and says see you next month. I couln't even get it to the point where it
would render a single line.
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> > Hmm... To really slow things down, would there be any way to use the
> > trick to simulate variable internal IOR, however crudely?
> >
> > It would probably require an obscenely high max_trace_level though.
>
> You can, and it does. It can get very slow.
I thought it might :)
> > And i can't remember if you can apply a pattern to the surface iro or
> > not, as I't sbeen a while since I played with POV.
translation:
And I can't remember if you can apply a pattern to the surface ior or
not, as it's been a while since I played with POV.
> You can't any more, that was removed in 3.1 because it didn't really
> make any sense. Earlier versions had ior in the finish block, so you
> could use a texture_map, 3.1 and 3.5 have it in the interior block.
Oh, I knew it was in the interior block, I just couldn't remember if
there was any way to vary the ior over the surface of an object.
> However, you could apply a normal to the refracting layers if all you
> want is to introduce some irregularities.
As well as increasing the render time further still, and requiring even
higher max_trace etc. etc.
Yeesh. Please ignore the typo's, my brain has gone on holiday for the
evening :)
Jamie.
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