[oz42]

Here are some of my experiments with SSS, trying to detemine what setting are needed and how they change. The trouble is I can't tell the difference between them.

I'm using a model from Stanford hi-res scanning repository (http://graphics.stanford.edu/data/3Dscanrep/) polygon reduced in XSI, exported as an obj, via Wings3D (to correct the obj file), into MatadorLight [thanks daros] and rendered - phew!

All are rendered at 320x240 with a sampling level of 12 (nice and quick) but they all look the same! I did run a longer test to sample level 18 but all that was added was a bit more clarity and lots of black dots (http://www.maxwellrender.com/forum/viewtopic.php?t=3977).

Has anyone else had any luck with deciphering the Absorption and Scattering settings? Are they very sensitive and therefore need very low values?

Absorption = 0.00, Scattering = 0.00 [Reference]..............................................Absorption = 0.00, Scattering = 0.00 [Reference]


Absorption = 0.25, Scattering = 0.00.................................................................Absorption = 0.00, Scattering = 0.25


Absorption = 0.50, Scattering = 0.00.................................................................Absorption = 0.00, Scattering = 0.50


Absorption = 0.75, Scattering = 0.00.................................................................Absorption = 0.00, Scattering = 0.75


Absorption = 1.00, Scattering = 0.00.................................................................Absorption = 0.00, Scattering = 1.00


More tests to follow...

[iker]

Great tests oz42!

[abgrafx3d]

Has anyone else had any luck with deciphering the Absorption and Scattering settings? Are they very sensitive and therefore need very low values?

Great tests! From the manual

http://www.maxwellrender.com/MaxwellUserManual.pdf:

"Absorption coef - Defines the amount of light to be absorbed through the object surface. When set, object will start to gather light inside.

Scattering coef - Defines the amount of light to be scattered back from sub-surface. When increased, object will become more translucent."

[Hervé]

thanks for testing... how about a mix of both values ...?

they are very dependent on each other....

[spekoun]

I did similar test with similar result. My feeling is: NL said simple SSS so it is on or off, does not matter of value...

[fuso]

AAHH!! ARNOLD, GET ME OUT OF HERE. THAT IS A MAXWELL CAMERA!!



I like the scattering... considering it's in a quite early stage. Thanks for
those tests.. very useful indeed.

[Hervé]

itis when you start playing with both values that it makes a big difference...

I'll post results a bit later, but so far

0,15 / 0,1 = super glowing object, it shines almost like an emitter

0,15 / 5 = looks normal.... although....

I mean all the tests I see now demonstrate a plastic that looks very soft... but for Hard mass tinted plastics....

Really nice Character Fuso...

[Thomas An.]

Nice test ! You were a bit more thorough (patient).

I had the same problem understanding the settings some time ago
http://www.maxwellrender.com/forum/viewtopic.php?t=3752