What do I set cauchy B to?

Lord of the Rings Junkie · Post by **Lord of the Rings Junkie** » Tue Apr 17, 2007 7:08 am

Could someone please tell me the correct values for water and clear glass? Or how to figure them out?

Kram1032 · Post by **Kram1032** » Tue Apr 17, 2007 7:13 am

both water and glass have cbc of
0.003, but I warn you: Indigo has to calculate each ray as different colour, then!
Normally, when you turn it off, Indigo will use the whole emitted spectrum, of your lightsources -> cbc is VEY slow and I never saw a 100% noisefree image WITH it, yet...

Erman had a great list of cbc's anywhere...

ryjo · Post by **ryjo** » Tue Apr 17, 2007 7:13 am

Here are a sample of values:

http://en.wikipedia.org/wiki/Cauchy_equation

Lord of the Rings Junkie · Post by **Lord of the Rings Junkie** » Tue Apr 17, 2007 7:28 am

Ok, so I'm looking at about .004 for the glass. What about the water? Kram, I do realize it will make my renders longer, but it will also make them prettier.

Kram1032 · Post by **Kram1032** » Tue Apr 17, 2007 7:31 am

oh...
I wrote 0.3 xD
I meant 0.003

both water and glass ~ 0.003, but you have more exact glass datas, now

as already said, erman had a great list...
dunno, where it is...
I'll search it, now

Kram1032 · Post by **Kram1032** » Tue Apr 17, 2007 8:00 am

Hmmm.... The list was IoR only

But I found a way, how to calculate cbc by using Complex IoR.... not sure, though:
http://www2.indigorenderer.com/joomla/f ... hlight=ior

the list of IoRs was http://www.robinwood.com/Catalog/Techni ... xList.html and is interesting, too

Lord of the Rings Junkie · Post by **Lord of the Rings Junkie** » Tue Apr 17, 2007 9:06 am

Ok, thanks.

I think 0.003-0.004 should be accurate enough for now. Thanks for that thread.

neo0. · Post by **neo0.** » Fri Jun 20, 2008 4:21 pm

Is there a cbc value for wine, milk, etc?

Kram1032 · Post by **Kram1032** » Sun Jun 22, 2008 5:44 am

yes, sure. Though don't ask me which values.

What do I set cauchy B to?

What do I set cauchy B to?

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