subsurface scattering

[akiefer]

Hi,

Are there any links to methods of work for sub surface scattering with VRay and c4d? I have noticed that some of the Vray material options are not the same fro the Max implementation and Cinema...

Albert

[glass.use]

yes sss is missing :(

[vesale]

the sss is located in the refraction options of materials

[glass.use]

i know but i couldn't get it to work at all

[akiefer]

Not entirely... the option is there in the refraction section of the Vray material but how to systematicall work it is still a puzzle :)

I am working on it though...

http://www.sectora.net/vray/green_jelly.jpg

Albert

[InTheCity]

I was having no success until I turned my fog level (absorption) to 1 (full)
and the 'Light Multiplier' in the SSS settings to at least 1000%

My diffuse material is 20% transparent, but it won't appear transparent with the high absorption.

I also have some low level AO in the diffuse channel for a little grunge/dirt.

http://www.project1media.com/vray/sss.jpg

http://www.project1media.com/vray/ao1.jpg

http://www.project1media.com/vray/fog1.jpg

Don't quote me on this being the intended way, but it works for what its worth.

[InTheCity]

Here's another;

http://www.project1media.com/vray/statue.jpg

and the material -
http://www.project1media.com/vray/SSS.rar

[akiefer]

Looks great in the city...

I found out that scale also is a BIG issue once again ;)

So for instance the cube in the above exaple... when I applied that material to the material scene (the one you see around here a lot with the orb, the surface of that holder was completely transparent!

Albert

[DanieleF]

Hi guys,
the SSS effect need a diffuse layer with some transparency (usually a high one, for example > 80%), a reflection or specular layer with use fresnel checked, the refraction layer with volume and sss activated.
the Volume should have the amount set to 1 with a color different from totally white. Aso some level of glossiness in the refraction layer could give better results.

Cheers
Daniele

[Tong]

Hi guys,
the SSS effect need a diffuse layer with some transparency (usually a high one, for example > 80%), a reflection or specular layer with use fresnel checked, the refraction layer with volume and sss activated.
the Volume should have the amount set to 1 with a color different from totally white. Aso some level of glossiness in the refraction layer could give better results.

Cheers
Daniele

place material example please ;-)

[Fluffy]

mm. yes Daniele, the only result I get with similar settings as what you explained is closer to frosted glass than SSS.
Would you mind sharing an example?

[InTheCity]

Check link above, she described pretty much the same technique as in my sample file.

[Fluffy]

Sorry, which link?
The only one I see is the one leading to your file, but nothing about a "she" describing anything?
I must be blind :)

[klon22]

Sorry, which link?
The only one I see is the one leading to your file, but nothing about a "she" describing anything?
I must be blind :)

here is the file: http://www.project1media.com/vray/SSS.rar

she, may be pic about she: http://www.project1media.com/vray/sss.jpg
lol

or may be she:
http://www.project1media.com/vray/statue.jpg

ok, tnx for info

[InTheCity]

I assume DanieleF is a she.

My point was, somebody asked her for a sample file and I'm saying I'd already shared one with a similar setup.

[stefan]

no DanieleF is our main programmer with Renato;-)
he is a he...
cheers
stefan

[Tong]

http://www.kolobok.us/smiles/artists/laie/Laie_24.gif -> http://www.kolobok.us/smiles/artists/snoozer/mafia.gif


http://www.kolobok.us/smiles/artists/connie/connie_mykilroy.gif

[vesale]

stefan, or daniele or renato, is there a chance to get some clue or hints whatsoever to how to get a working SSS or kind a bakclight material?

i got a current project for wich i must do panel of sliced marble with backlight hided, everything i had try didnt work that far... :cry: :cry:
we need some help, please enlighten us :cry:

[nycL45]

Thanks for the help with SSS InTheCity and DanieleF.

BTW, after a year + of reading tens of thousands of posts about VfC over at CGTalk and up until just after VfC hit the streets, I too thought DanieleF was something other than a male.

[bunk]

stefan, or daniele or renato, is there a chance to get some clue or hints whatsoever to how to get a working SSS or kind a bakclight material?

i got a current project for wich i must do panel of sliced marble with backlight hided, everything i had try didnt work that far... :cry: :cry:
we need some help, please enlighten us :cry:

I don't think this is currently possible due to the bug described here:
http://forum.vrayforc4d.com/viewtopic.php?t=495

...but I would love to hear I'm wrong. I'm trying to a create a sss-skin material. Have had no luck so far.

bunk

[InTheCity]

...but I would love to hear I'm wrong. I'm trying to a create a sss-skin material. Have had no luck so far.

bunk

Skin is tricky, a constant value won't cut it, you'd need to create some sort of suppression map that lessens the effect in smaller areas, such as fingers and ears.

[bunk]

a constant value won't cut it

I'm already happy with a constant value. So far I have not seen any proof that that is even possible.

Cheers,

bunk

[stefan]

we are not aware of a bug in the volume refraction?

sss is possible of course. make sure your volume isnt too dark, use slight values only. of course a sss material need roughness, most plastics also have a bit of diffuse body in it.

it also sees backlight (and shadpws) of course...

cheers
stefan

[shtl]

Did ya found out a way Vesale?
I'd also be interested in a backlit plastic. Gat something quite OK from AR with chanlum, but in animation it was way too slow :(

As for a skin shader start...
http://www.shtl.org/FC4D/SMC104/smc104_planche-01-1600.jpg

far from being perfect, but if anyone's interested in this as a base research? :wink:

Just descovered thoose SSS shaders from "inthecity", I'm gonna check it out... So thanks for sharing guys.