absorption and scattering coefficients for liquids

General questions about Indigo, the scene format, rendering etc...
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OnoSendai
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Post by OnoSendai » Wed Jan 17, 2007 2:39 am

ZomB wrote:
OnoSendai wrote: Sorry to tell you dude, but it seems to crash with env_maps too, and also if you try to illuminate the Scene with a background Spectrum thing without other lightsources :(
No, please tell me about the bugs, then i can fix them :)

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Zom-B
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Post by Zom-B » Wed Jan 17, 2007 3:21 am

OnoSendai wrote:No, please tell me about the bugs, then i can fix them :)
SSS used in a Scene with a env_map or a Scene illuminated with a background Spectrum without other lightsources => Indigo Crash.

I try to create you some simple example Scenes for both scenarios für your
debugging purposes :)
polygonmanufaktur.de

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Zom-B
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Post by Zom-B » Wed Jan 17, 2007 3:47 am

OK....

For Scenes only illuminated with Background, sun and env_map are this SSS Bug that kills Indigo at start Up, if the SSS material is transparent, if the SSS Material isn't transparent Indigo starts, but sometimes the results are looking very strange :?

As soon as you add another lightsource to a scene indigo works normally without crashing and without strange output...
>>HERE<< three simple Test Scenes...

Hope this helps
polygonmanufaktur.de

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OnoSendai
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Post by OnoSendai » Wed Jan 17, 2007 3:50 am

THanks ZomB, very helpful.
I think i've found the problem, i'm assuming there's an arealight (mesh/rectangle) when doing SSS traversal :)

8bstudio
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Post by 8bstudio » Wed Jan 17, 2007 3:55 am

Hi!
Here a pdf to convert "absorption_coefficient_spectrum" and "scattering_coefficient_spectrum" from Jensen table in Indigo 0.7t1 values like Ono said in this his first message! I hope it's usefull!
http://www.8bstudio.com/bonus/scattering.pdf
Bye!

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fused
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Post by fused » Wed Jan 17, 2007 3:58 am

Thank you very much!

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OnoSendai
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Post by OnoSendai » Wed Jan 17, 2007 4:05 am

Thanks 8bstudio, but you're missing the last blue column.
Can you include the 'g' values as well?
thanks :)

EDIT: thanking 8bstudio now :)
Last edited by OnoSendai on Wed Jan 17, 2007 4:39 am, edited 1 time in total.

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fused
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Post by fused » Wed Jan 17, 2007 4:07 am

no problem... although you should thank 8bstudio :wink:

8bstudio
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Post by 8bstudio » Wed Jan 17, 2007 4:14 am

OnoSendai wrote:Thanks fused, but you're missing the last blue column.
Can you include the 'g' values as well?
thanks :)
Sorry!
Here new pdf file! I hope there aren't any errors now!
http://www.8bstudio.com/bonus/scattering.pdf

Phil
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Post by Phil » Wed Jan 17, 2007 4:37 am

:D

Thanks 8bstudio, really nice 8)

Regards, Phil

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Camox
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Post by Camox » Wed Jan 17, 2007 4:54 am

Thx 8bstudio for convert the values , the list ist very helpful ! :D


@ ZomB

I have also looked sometimes Blender. This looks very much complex, also remains rather with c4d. This edit irritates, but to learn still better than Blender. I will provide sometimes to do lists for c4d user which do not know a lot thus with xml.

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CTZn
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Post by CTZn » Wed Jan 17, 2007 6:55 am

Thanks 8bstudio !

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Post by Phil » Wed Jan 17, 2007 9:49 am

Hi,

this a first strange result after 1 hour 40 minutes>
Image

The wine is a merlot, the lighting is a combination between a mesh emitter and a kittchen_probe.float map
Mz surprise is the strange red, green blue caustics effects!

Regards, Phil

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Zom-B
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Post by Zom-B » Thu Jan 18, 2007 7:42 am

here another wine test, illuminated by the famous kitchen HDRI
Image

I enabled "polarisation", even if I have no clue what it does

Thanks a lot for your PDF 8bstudio VERY usefull!!
A integration into the Indigo manual manual would be nice I think :roll:
polygonmanufaktur.de

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manitwo
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Post by manitwo » Thu Jan 18, 2007 7:51 am

ZomB wrote:here another wine test, illuminated by the famous kitchen HDRI
Image

I enabled "polarisation", even if I have no clue what it does

Thanks a lot for your PDF 8bstudio VERY usefull!!
A integration into the Indigo manual manual would be nice I think :roll:
Image

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