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17 Nov 2024 19:15:46 EST (-0500)
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From: Rene Bui
Subject: Human skin : SSS and faking method
Date: 6 Jan 2005 03:25:01
Message: <web.41dcf4e6ca06a2f09cc1eaf50@news.povray.org>
Hi all,
I'm working on skin+sss through pov media. Well... I would say : it's SSSo
hard !
As you know , too many translucent problems, a lot of time for tweaking and
then waiting for render etc. etc.
Now I say to myself : probably it's time to give up. :-(

I'm not happy with the results but perhaps my eyes are simply tired.
Anyway, here are some of my last tests.


Rene
(the old newbie)


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ssstest1.jpg


 

From: Rene Bui
Subject: Re: Human skin : SSS and faking method
Date: 6 Jan 2005 03:35:01
Message: <web.41dcf771422926ef9cc1eaf50@news.povray.org>
On the other hand, I've tried to make my own faked sss method.
I've used aoi (angle of incidence) pattern and shadow_pigment.
Aoi pattern is available in MLPov 0.8 and Megapov 1.1.
Shadow_pigment is only a MLPov 0.8  feature (I think).

I must say that Gilles had used aoi yet within Cinema4D :
http://www.oyonale.com/histoire/images/vicky3_hdri_C4D2.jpg
and a faked aoi using a slope map in Pov3.5 :
http://www.oyonale.com/ldc/images/grandrue_est_bleu_detail1.jpg

Here is my before-after image. It's seems she took a DHEA pill !
The head is always my old-first-not-really-good Wings figure. I use it as a
guinea-pig ..(is it the correct word in English ?)
There are 2 bluish area_lights.

Rene
(the old newbie)


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fsss_test_ba.jpg


 

From: Rene Bui
Subject: Re: Human skin : SSS and faking method
Date: 6 Jan 2005 03:40:01
Message: <web.41dcf83f422926ef9cc1eaf50@news.povray.org>
#1 matte default
#2 matte uv-map
#3 aoi layer. The aoi is linked to the camera location point.
#4 uv-map and aoi layers are blended using transmit. We can see the white
edge.

Rene
(the old newbie)


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From: Rene Bui
Subject: Re: Human skin : SSS and faking method
Date: 6 Jan 2005 03:40:01
Message: <web.41dcf90d422926ef9cc1eaf50@news.povray.org>
#5 + ambient color
#6 + reddish shadow_pigment to mimic translucent effect.
#7 + light group => only skin and inner parts are concerned
#8 + highlights

Not perfect. Of course, the method could be improved.
But very FAST render

Rene
(the old newbie)


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fsss_test_5678.jpg


 

From: Rene Bui
Subject: Re: Human skin : SSS and faking method
Date: 6 Jan 2005 03:45:00
Message: <web.41dcf99d422926ef9cc1eaf50@news.povray.org>
And as bonus, here is the Jaime's custom car paint version ! ;-)

Rene
(the old newbie)


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From: Jaime Vives Piqueres
Subject: Re: Human skin : SSS and faking method
Date: 6 Jan 2005 04:50:33
Message: <41dd09e9$1@news.povray.org>
Rene Bui wrote:
> Now I say to myself : probably it's time to give up. :-(

   :) ...because it's hard to do it better? You done it very well, much 
better than my lame first attempt, which had much more artifacts. The 
problem I think with SSS is that you will need a realistic structure 
inside (bones and muscles) to get a realistic head. On the other hand, 
the MLPov tests are also awesome, and very convincing too.

--
Jaime


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From: Marc Jacquier
Subject: Re: Human skin : SSS and faking method
Date: 6 Jan 2005 06:45:00
Message: <41dd24bc@news.povray.org>

news:web.41dcf4e6ca06a2f09cc1eaf50@news.povray.org...
> Now I say to myself : probably it's time to give up. :-(
>
Don't give up! (Kate Bush's or Pete Gabriel voice as you want)
I agree tweaking scattering media is not really a rest cure :/

Marc


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From: Roberto Amorim
Subject: Re: Human skin : SSS and faking method
Date: 6 Jan 2005 06:45:42
Message: <41dd24e6@news.povray.org>
Fantastic. You're not a newbie by any sense of the word. Definitely not. :-)

You said it's fast to render. How fast?


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From: Greg M  Johnson
Subject: Re: Human skin : SSS and faking method
Date: 6 Jan 2005 10:03:54
Message: <41dd535a$1@news.povray.org>
Excellent work.

I must add however that I had a tiny lol to myself when I saw that sphere 
and thought it best described as "fake pornography."


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From: Ross
Subject: Re: Human skin : SSS and faking method
Date: 6 Jan 2005 12:09:38
Message: <41dd70d2$1@news.povray.org>
wow. i think you have been staring at them too long to make an unbiased
judgement. they are extremely impressive.


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