Subsurface scattering: my first work
...
... yeah, I am afraid of you guys!
If you say that photos looks "promising"... !
Anyway, i have tried in these days to emulate the light condition of the two photos. These are the results.
Still not 100% happy but...
BTW, I am having problems with the henyey-greenstein coefficients.
In these two renderers I put it to 0 for RGB, while using the values tabulated by Jensen i get a dirty gray substance! Also, keeping the value but reversing the sign (I thought that maybe the sign convention was different) I get a bluish stuff. Any ideas?
If you say that photos looks "promising"... !
Anyway, i have tried in these days to emulate the light condition of the two photos. These are the results.
Still not 100% happy but...
BTW, I am having problems with the henyey-greenstein coefficients.
In these two renderers I put it to 0 for RGB, while using the values tabulated by Jensen i get a dirty gray substance! Also, keeping the value but reversing the sign (I thought that maybe the sign convention was different) I get a bluish stuff. Any ideas?
- Attachments
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- im1216422399.png (275.13 KiB) Viewed 3169 times
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- blck bottom. notice how the milk darkens
- im1216475005.png (282.27 KiB) Viewed 3169 times
Those look nice but still too opaque for me, especially compared with your photo. Perhaps you should use some artistic licence and make the milk a notch more transparent than the data suggests.
Have a look at this Maxwell milk glass here, (scroll down the page).
Have a look at this Maxwell milk glass here, (scroll down the page).
my last milk
I played again a bit with this milk glass. Basically I just changed the lighting: now it is an env map from evermotion which i converted to exr. I am pretty satisfied, but still I dont understand why using the h-g coefficients from Jensen I get something wrong... here I just put g uniform and = 0.
- Attachments
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- milk.png (300.93 KiB) Viewed 2858 times
i can assure, that if you enter the data right in cindigo, it will be exported as expected. for rgb its a bit tricky to get the right values, tho.
heres a quick howto:
1. set RGB slider to 0...100% (0% represents 0.0 and 100% 1.0)
2. give your values in a valid range (0-1; eg 85% for 0.85, 12% for 0.12, 0.045% for 0.0045, etc.)
3. tweak the "gain" parameter to get the right values, its just a multipier (in case of the 0.045%, if the desired value was 45 it has to be set to 10000)
heres a quick howto:
1. set RGB slider to 0...100% (0% represents 0.0 and 100% 1.0)
2. give your values in a valid range (0-1; eg 85% for 0.85, 12% for 0.12, 0.045% for 0.0045, etc.)
3. tweak the "gain" parameter to get the right values, its just a multipier (in case of the 0.045%, if the desired value was 45 it has to be set to 10000)
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