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SSS material tests
Posted: Wed Jan 17, 2007 4:33 am
by OnoSendai
I plan to do some tests, messing round with parameters here.
Test scene is a modified one of radiances.
Will put up for download soon.
You will need to download the dragon from here:
http://www-graphics.stanford.edu/data/3Dscanrep/
The dragon is about 11cm tall in these renders.
You'll have to wait for 0.7 test 2 to use the henyey_greenstein phase function
EDIT: replaced with 2h45m render time version.
Material:
Code: Select all
<medium>
<name>jade</name>
<ior>1.6</ior>
<cauchy_b_coeff>0.0</cauchy_b_coeff>
<precedence>20</precedence>
<absorption_coefficient_spectrum>
<rgb>
<rgb>2000 2 2000</rgb>
</rgb>
</absorption_coefficient_spectrum>
<subsurface_scattering>
<scattering_coefficient_spectrum>
<uniform>
<value>1000</value>
</uniform>
</scattering_coefficient_spectrum>
<phase_function>
<henyey_greenstein>
<g>0.8</g>
</henyey_greenstein>
</phase_function>
</subsurface_scattering>
</medium>
<material>
<name>default</name>
<!--specular>
<transparent>true</transparent>
<internal_medium_name>jade</internal_medium_name>
</specular-->
<glossy_transparent>
<internal_medium_name>jade</internal_medium_name>
<exponent>600</exponent>
</glossy_transparent>
</material>
Posted: Wed Jan 17, 2007 4:55 am
by fused
That looks absolutely beautiful! Awesome render.
nice dof btw
when can we expect test 2?
Posted: Wed Jan 17, 2007 4:56 am
by OnoSendai
test 2 will be out in the next few days i think.
Posted: Wed Jan 17, 2007 6:02 am
by Camox
Play with sss. The results are not really adequate. I have to find big difficulties the right values.
The yellow material is from Bandar ! Testscene from Ono and Bandar, thx guys for sharing.
Posted: Wed Jan 17, 2007 6:13 am
by sprocket
Beautiful material!
Just curious, you say it is 11cm tall, is one unit in Indigo equal to one metre?
OnoSendai wrote:You'll have to wait for 0.7 test 2 to use the henyey_greenstein phase function Smile
Does thet mean there are other scattering functions like mie and rayleigh in the pieline too??
Posted: Wed Jan 17, 2007 6:28 am
by OnoSendai
Yes, Indigo units are metres.
I may get round to Rayleigh and Mie phase functions.
Would be pretty cool to actually simulate atmospheric scattering etc... with just a sunlight
Posted: Wed Jan 17, 2007 6:31 am
by CTZn
Camox wrote:thx guys for sharing.
Yes, thx people for sharing ! I'm silently copying every posted code in individual xml files for later use
Posted: Wed Jan 17, 2007 6:45 am
by Camox
CTZn wrote:Camox wrote:thx guys for sharing.
Yes, thx people for sharing ! I'm silently copying every posted code in individual xml files for later use
Jo silently and auricularly ! What you use ? Your self contrived xml code ?
You are the best.
Posted: Wed Jan 17, 2007 8:13 am
by Kosmokrator
i think Ono u are genius...anyway i found an calculator for
Mie phase function i think may help u in some way
u have done amazing work in a sort time!!
http://www.lightscattering.de/MieCalc/
Posted: Wed Jan 17, 2007 2:10 pm
by domparis
Good result Nick, good to know a test2 is almost there
So i trying to get some decent result in a way to simulate skin, but like other already said, the specular effect is to much important at a ior between 1.3 and 1.5 and if i set it to a value near 1, i lost the real effect inside the volume.
Have u tracked the bug with skylight ?
Good work and thanks for your effort doing so many ehancement to your renderer !!
Dom
Ok, after seeing your code, using properly the glossy_transparent function help a lot
Posted: Thu Jan 25, 2007 10:42 pm
by Bandar
Posted: Sun Feb 04, 2007 1:05 am
by YaroslavL
Can anybody share *.blend file with some SSS material?
Thanks.
Re: SSS material tests
Posted: Sat Mar 17, 2007 11:03 am
by danyolgiax
What model i've to download?
Range data:
dragon_stand.tar.gz (6.1 MB compressed, 23 MB uncompressed)
dragon_side.tar.gz (4.2 MB compressed, 16 MB uncompressed)
dragon_up.tar.gz (5.7 MB compressed, 24 MB uncompressed)
dragon_fillers.tar.gz (6.7 MB compressed, 26 MB uncompressed)
dragon_backdrop.tar.gz (11 MB compressed, 44 MB uncompressed)
Vripped reconstruction:
dragon_recon.tar.gz (11 MB compressed, 43 MB uncompressed)
???
tnx
Posted: Sat Mar 17, 2007 4:49 pm
by OnoSendai
You want
dragon_recon.tar.gz
Posted: Tue Mar 20, 2007 10:58 am
by mrCarnivore
I really have some problems with the dragon. I dl'ed the dragon and imported the .ply into blender. I tried res3 and res4 and with both I get some normals flipped and also non-manifold mesh. Re-calculating the normals made things even worse. I think it's because oof the non-manifold mesh that blender gets confused.
Can somebody pls post a blend with the dragon where those problems are not occuring?
Also I'm a little confused by the sss. I used blendigo to try to use this material:
http://www2.indigorenderer.com/joomla/f ... =8824#8824
My material code is this:
Code: Select all
<medium>
<name>DragonMaterial</name>
<precedence>10</precedence>
<basic>
<ior>1.2</ior>
<cauchy_b_coeff>0</cauchy_b_coeff>
<absorption_coefficient_spectrum>
<rgb>
<rgb>0 4.5 5</rgb>
</rgb>
</absorption_coefficient_spectrum>
<subsurface_scattering>
<scattering_coefficient_spectrum>
<rgb>
<rgb>4 20 200</rgb>
</rgb>
</scattering_coefficient_spectrum>
<phase_function>
<uniform/>
</phase_function>
</subsurface_scattering>
</basic>
</medium>
<material>
<name>DragonMaterial</name>
<specular>
<transparent>true</transparent>
<internal_medium_name>DragonMaterial</internal_medium_name>
</specular>
</material>
Seems almost the same to me, doesn't it? The result, however, looks nothing like the original post:
