Skin shader with SSS

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Re: Skin shader with SSS

Postby face_off » Fri Apr 05, 2013 8:44 am

face_off Fri Apr 05, 2013 8:44 am
I'll take a look. But didn't you say it was in poser plugin format?

The geometry and textures will load into anything. There is an OCS file in there two. It's only the SSS shader that I posted which is Poser plugin format, but shouldn't take much to convert it to Standalone.

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Re: Skin shader with SSS

Postby sigmamoon » Sat Apr 06, 2013 10:20 am

sigmamoon Sat Apr 06, 2013 10:20 am
very interesting work,

your head skin look great "mib2berlin" but i think the sss is not enought.

but i thnik there is a problem with octane standalone v1.11 (and then v1.12)
i m looking for some nice guys to discuss about it

for me octane v1.10 was right with SSS parameters but since the v1.11 there is something wrong

you look to have a good skill "face_off"
look that my simple SSS test below

i dont know why we can t reproduce the same smooth and easy effect inside the 1.11 version
what you think about it ?
Attachments
sss_V1.10.jpg
5mn and easy thicness control of the yellow SSS
sss_V1.11_v1.12.jpg
same parameters V1.11+1.12
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Re: Skin shader with SSS

Postby face_off » Sat Apr 06, 2013 10:48 am

face_off Sat Apr 06, 2013 10:48 am
sigmamoon....

Is it possible the model has loaded into the scene with a different scale? What happens if you set the scattering scale to 1?

Is there a link to that model - I will try it out.

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Re: Skin shader with SSS

Postby sigmamoon » Sat Apr 06, 2013 11:05 am

sigmamoon Sat Apr 06, 2013 11:05 am
it's the same OBJ for the both scene (cause i take the same octane scene for the v1.10 and the v1.11)

but i dont really know the scale of the object at the end.

you can download it,

look at my video with this scene over the v1.10, it s really easy to control the color and the thickness, but nothing happen with the same scene inside the v1.11

[vimeo]http://www.vimeo.com/62791331[/vimeo]

Above all, if you dont open an obj and you make a simple SSS diffuse node, i don t have the same result between versions. More than, the V1.11 looks very noisy

don t you have this feeling? can you, simply make SSS effect like mine inside the v1.11?
if you have an another expertise it could help me a lot cause i m working on it.

Thank a lot "face_off"
Attachments
sss_v1.10.rar
(4.76 MiB) Downloaded 280 times
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Re: Skin shader with SSS

Postby face_off » Sat Apr 06, 2013 2:15 pm

face_off Sat Apr 06, 2013 2:15 pm
I was able to get SSS working on that model by dropping the scattering scale, but I could not get the nice effects you had with 1.10 in the short amount of time I had available. May I suggest post the info you've posted here in the Test forum as a bug report and hopefully someone more knowledgeable than us can shed some light on the issue.

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Re: Skin shader with SSS

Postby sigmamoon » Sat Apr 06, 2013 2:50 pm

sigmamoon Sat Apr 06, 2013 2:50 pm
face_off wrote:I was able to get SSS working on that model by dropping the scattering scale, but I could not get the nice effects you had with 1.10 in the short amount of time I had available. May I suggest post the info you've posted here in the Test forum as a bug report and hopefully someone more knowledgeable than us can shed some light on the issue.

Paul


Tanks a lot paul,

nice to talk about this problem cause as anybody wants to give me a reply, and i do many forum topics, it s just important to know for me if it s my fault or octane (even if i was pretty sure about this issue).

thanks a lot for your time and to have answer my issue

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Re: Skin shader with SSS

Postby mib2berlin » Mon Apr 08, 2013 5:06 am

mib2berlin Mon Apr 08, 2013 5:06 am
Hi all, this is possible with Blender Cycles but can´t reproduce with Octane for me.

http://blenderartists.org/forum/showthr ... ost2348085

I think it is about me lacks to understand Octane´s material system.
May some Octane user jump in to help me.
Files are in first post.

Cheers, mib.
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Re: Skin shader with SSS

Postby face_off » Mon Apr 08, 2013 5:24 am

face_off Mon Apr 08, 2013 5:24 am
What specifically in that blender thread cannot you reproduce? The render of the head are looking a little candle-wax like to me.

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Re: Skin shader with SSS

Postby sigmamoon » Mon Apr 08, 2013 7:57 am

sigmamoon Mon Apr 08, 2013 7:57 am
i think mib2berlin wants the same tchikcness ear SSS effect

even if it s a little wax effect in this blender exemple, i m pretty sure it s not really easy to do it inside octanerender v1.11

as you can see in my example above, it will be very easy over the v1.10, but something happen from the v1.11. or the SSS strategy have changed, and i dont know how to do it

mib2berlin, can you just put clear OBJ (maybe not exactly this head or something near) if i have some time i d like try it

or do you have seen my simple parameters to control the sss effect over the v1.10 octanerender?
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Re: Skin shader with SSS

Postby face_off » Mon Apr 08, 2013 9:37 am

face_off Mon Apr 08, 2013 9:37 am
I quickly turned off the front light and up the sss effect - and you can see there is some ear glow.

After that I played with the cone and emitter in standalone - comparing 1.00 with 1.10. They are different. Firstly I needed to disable alpha-shadows. Also, check your rayepsilon isn't wrong for your scene size. The maxdepth makes a HUGE difference. If you want strong sss in the ears, turn maxdepth down to 3 or 4. The higher the maxdepth, the more the sss bounces around diminishing the effect.

Another thing - SSS skin shaders mix a glossy and diffuse node. So the sss effect from the diffuse node will be diluted by the glossy.
Attachments
head sss.png
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