SSS materials

nikolatesla20 · Post by **nikolatesla20** » Fri Mar 09, 2007 9:58 am

Hi,

I'm using the 0.7t5 exporter for blender, and also just hand-editing the file myself.

I'm trying to get an example of SSS materials to work, but I keep having issues. When I try the "flesh" example XML code, the XML has errors, and plus, instead of appearing pink, it appears green

(from Radiance's example here

So just looking for a small example of SSS from blender, using the 0.7t5 script, and what settings were actually used in Blender itself. I'm not getting what I would call "good" results, because I have Suzanne, for example, with SSS material, but I don't see light "scattering" thru her..

my example XML file:

-niko

CTZn · Post by **CTZn** » Fri Mar 09, 2007 4:52 pm

And about color inversion, that's because of what absorbtion is: it substracts the colors you tell him, so only the other colors are visible at the end. If you give him pink, that's what the medium will absorb: pink, and it's color would appear... bah, you know already

Kram1032 · Post by **Kram1032** » Sat Mar 10, 2007 3:51 am

green...
or...
cyan...
depends on the pink...

nikolatesla20 · Post by **nikolatesla20** » Sat Mar 10, 2007 4:05 am

Thanks for the info guys, the blendigo script is awesome!

here's a pic I made experimenting with SSS. It's that pink egg carton type foam that you sometimes see in packing. I know, it needs to be brighter..

Also, ignore the smoothing issues

(the black spots)

-niko

nikolatesla20 · Post by **nikolatesla20** » Sat Mar 10, 2007 8:01 am

Haha

This is sooo sweet. Blendigo makes it so much easier

Now I just need to get a faster computer at home.

Here's a Suzanne made out of wax, render time about 1 hour, still a bit noisy of course, but the SSS is great!

-niko

locke · Post by **locke** » Sat Mar 10, 2007 10:27 pm

Hi niko,
could you show us your Blendigo settings?
It Looks Great !
Locke

nikolatesla20 · Post by **nikolatesla20** » Sun Mar 11, 2007 1:59 am

well for the foam:

Specular material
Absorption absorb everything but pink. set gain higher, like 15 or 20.
IOR 1.0
subsurface scattering turned on, set to uniform, with value of around 3 or 4. If it starts looking too transparent, then set the value a little higher, but not too high.

For the monkey wax:

specular material
absorb all but green, gain up around 20 I think, maybe higher
IOR 1.1
subsurface scattering turned on, uniform, set value to 2.0.
I used a HDRI probe to make it look more real. (an .exr environment map)

I don't have screenshots since these were tests, but I do remember most of the settings were not extreme.

-niko

locke · Post by **locke** » Mon Mar 12, 2007 6:31 am

Hi Niko,
before i forget it Thanx, that give me a kick forward
Locke

Kram1032 · Post by **Kram1032** » Tue Mar 13, 2007 2:01 am

very nice mats!
2 things:
I *think* IOR should be higher for Wax, therefor lower exponent, as you nearly can't see any reflections, normally.
Then: Maye the "value" should be higher, or the precedece, or something: The ear is much too transparent. At least @ standard, suzanne should have ears that are ~ 5cm thick -> way isn't transparent at this thickness.
I slightly can figure out, what's behind it, if it's white wax and just 5mm thick!
Also, test if you even can absorb a bit of the green things... this may give better results...

SSS materials

SSS materials

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