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get milk! (updt. 15.02.07)

Posted: Thu Jan 25, 2007 4:43 pm
by raja
attempting milk, not getting there, this is two layer material, one layer with SSS... this is confusing stuff... below are photos and ML of one test:

c&c welcome.

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Posted: Thu Jan 25, 2007 4:56 pm
by NicoR44
Great test, succes!!!! 8)

Posted: Thu Jan 25, 2007 5:16 pm
by -Adrian
I think Maxwell, at this stage, is a really bad tool to achieve this kind of look.

Posted: Thu Jan 25, 2007 5:21 pm
by raja
-Adrian wrote:I think Maxwell, at this stage, is a really bad tool to achieve this kind of look.
yes, i saw the 'orange juice' thread... and other threads on SSS...not very hopeful.

Posted: Thu Jan 25, 2007 5:23 pm
by raja
NicoR44 wrote:Great test, succes!!!! 8)
thanks. not very hopeful, but will give a few attempts. Or else its fake milk. :)

Posted: Fri Jan 26, 2007 5:39 am
by Tim Ellis
What are you using the other bsdf layer as?

Some info from wikipedia http://en.wikipedia.org/wiki/Milk#Physi ... _structure
Both the fat globules and the smaller casein micelles, which are just large enough to deflect light, contribute to the opaque white color of milk.
The fat globules contain some yellow-orange carotene, enough in some breeds — Guernsey and Jersey cows, for instance — to impart a golden or "creamy" hue to a glass of milk.
The riboflavin in the whey portion of milk has a greenish color, which can sometimes be discerned in skim milk or whey products (McGee 17).
Fat-free skim milk has only the casein micelles to scatter light, and they tend to scatter shorter-wavelength blue light more than they do red, giving skim milk a bluish tint.
So depending on which milk you are trying to recreate, the bsdf layers would need match appropriately. I think I'd use three probably four layers.

Base water layer. 87.8% weight
Base fat layer (.r2 file) 3.9% weight
Base scatter layer 100%
Scatter layer 2 (milk type dependant) 8.3%

Not had chance to do any tests yet though, but that's my hypothesis & would be my starting point.

Tim.

Posted: Mon Jan 29, 2007 10:12 am
by raja
I was using water + Color layer with SSS, to simulate water + scattering particles. The attempt was to get the scattering right, and then attempt types of milk. Will try some more tests today with more layers.

regards,
Tim Ellis wrote:What are you using the other bsdf layer as?

Some info from wikipedia http://en.wikipedia.org/wiki/Milk#Physi ... _structure
Both the fat globules and the smaller casein micelles, which are just large enough to deflect light, contribute to the opaque white color of milk.
The fat globules contain some yellow-orange carotene, enough in some breeds — Guernsey and Jersey cows, for instance — to impart a golden or "creamy" hue to a glass of milk.
The riboflavin in the whey portion of milk has a greenish color, which can sometimes be discerned in skim milk or whey products (McGee 17).
Fat-free skim milk has only the casein micelles to scatter light, and they tend to scatter shorter-wavelength blue light more than they do red, giving skim milk a bluish tint.
So depending on which milk you are trying to recreate, the bsdf layers would need match appropriately. I think I'd use three probably four layers.

Base water layer. 87.8% weight
Base fat layer (.r2 file) 3.9% weight
Base scatter layer 100%
Scatter layer 2 (milk type dependant) 8.3%

Not had chance to do any tests yet though, but that's my hypothesis & would be my starting point.

Tim.

Posted: Thu Feb 15, 2007 3:25 pm
by raja
Tom's got milk, its also two layer. I did similar tests some days ago, and some new ones, time to check:

I'm trying water+scattering particles, plus extra color for testing -

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test with this mateial -

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toms milk mxm -

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test with toms milk mxm-

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Posted: Thu Feb 15, 2007 4:03 pm
by tom
I'm not sure how you modeled the testing tube but it could be causing problems if it's not properly modeled as Thomas An. described. If you're sure it has no problem, then I need to let you know my milk material won't show something decent before SL19 ;) and the aim of 2nd layer is speculars, nothing about transparency.

Posted: Thu Feb 15, 2007 4:43 pm
by raja
hm. thanks Tom. Test tube is ok, I see what you mean by second layer. Will post when I have time for more tests.
tom wrote:I'm not sure how you modeled the testing tube but it could be causing problems if it's not properly modeled as Thomas An. described. If you're sure it has no problem, then I need to let you know my milk material won't show something decent before SL19 ;) and the aim of 2nd layer is speculars, nothing about transparency.