SkIndigo 1.1.16

Pibuz · Post by **Pibuz** » Wed Jun 17, 2009 9:10 pm

Hi Whaat!
Sorry: any possbile issue installing this version on Vista?

Whaat · Post by **Whaat** » Thu Jun 18, 2009 6:53 am

Pibuz wrote:Hi Whaat!
Sorry: any possbile issue installing this version on Vista?

Should be OK as long as Indigo is not located as a sub-folder in your Program Files folder. SkIndigo writes preview thumbnails and IGS files to the Indigo folder and there may be permission issues if Indigo is within the Program Files

Pibuz · Post by **Pibuz** » Thu Jun 18, 2009 7:27 pm

Oh, I see..
Thank you! Being not so expert of Vista, any folder suggested to put Indigo into?

Whaat · Post by **Whaat** » Fri Jun 19, 2009 1:37 am

Pibuz wrote:Oh, I see..
Thank you! Being not so expert of Vista, any folder suggested to put Indigo into?

Any other folder should be fine. I usually unzip Indigo to My Documents or put it right on my Desktop

Pibuz · Post by **Pibuz** » Fri Jun 19, 2009 2:12 am

Thank you very much! I'll keep you up-to-date

Pibuz · Post by **Pibuz** » Sat Jun 20, 2009 5:10 am

Ok: another silly request.
May you kindly point out what do the several SSS parametrs refer to?

Something like your first skindigo tutorial: that was very clear!

I'm trying to get an orange juice but it seems IMPOSSIBLE to me.

Gonna do some tests in the weekend though!

thank you!

Whaat · Post by **Whaat** » Sat Jun 20, 2009 4:03 pm

Pibuz wrote:Ok: another silly request.
May you kindly point out what do the several SSS parametrs refer to?

Something like your first skindigo tutorial: that was very clear!

I'm trying to get an orange juice but it seems IMPOSSIBLE to me.
Gonna do some tests in the weekend though!

thank you!

Don't let all the parameters worry you too much. The most important value is the Subsurface Scattering Value (spectrum). Typical values for SSS range from 0.3 (eg. smoky air) to well over 1000 (eg. milky liquid)

Whaat · Post by **Whaat** » Tue Jun 23, 2009 8:05 am

Pibuz wrote: I'm trying to get an orange juice but it seems IMPOSSIBLE to me.
Gonna do some tests in the weekend though!

Hey Pibuz,
Ever since this post, I have become obsessed with creating an orange juice material! I think I am getting close. I will post it when I have something worth posting.

I am realizing that a key in creating good liquids is the G Spectrum parameter. Make sure you have the phase function set to Henyey-Greenstein. I believe most (all?) liquids are more forward scattering. Therefore, the G Spectrum should be set close to 1.0. Take a look at the Indigo PDF manual. There are some scattering and G Spectrum values for various liquids that should give you a good idea about the typical ranges of these parameters.

suvakas · Post by **suvakas** » Tue Jun 23, 2009 9:56 am

This is my material I once created for orange juice, long time ago. It's a bit old though so i'm not sure if it works with new versions of Indigo anymore.
You could try?

Code: Select all

<!-- Exported From Maxigo 1.03.5 --> 

<scenedata>
		<medium>
			<name>juice-medium</name>
			<precedence>100</precedence>

			<basic>
				<ior>1.3</ior>
				<cauchy_b_coeff>0.0</cauchy_b_coeff>

				<absorption_coefficient_spectrum>
				<rgb>
				   <rgb>2.8 9.5 25.5</rgb>
				   <gamma>1</gamma>
				</rgb>
				</absorption_coefficient_spectrum>


				<subsurface_scattering>
					<scattering_coefficient_spectrum>
					   <uniform>
						<value>20.0</value>
					   </uniform>
					</scattering_coefficient_spectrum>

					<phase_function>
					   <uniform/>
					</phase_function>

				</subsurface_scattering>
			</basic>
		</medium>
		<material>
			<name>juice</name>
			<specular>
				<transparent>true</transparent>
				<internal_medium_name>juice-medium</internal_medium_name>
			</specular>
		</material>
</scenedata>

Whaat · Post by **Whaat** » Tue Jun 23, 2009 10:10 am

Nice one Suv! I remember seeing this one before but I forgot where. Thanks for sharing! I am surprised it came out so well with such a low scattering value. From my tests, I would think that 20 would be too transparent.

suvakas · Post by **suvakas** » Tue Jun 23, 2009 10:20 am

The glass is maybe too small to be realistic. You could try multiplying the SSS value by 10 or smth.

Pibuz · Post by **Pibuz** » Tue Jun 23, 2009 7:51 pm

Yeah: pretty cool Suv!
I thank you guys for your efforts!
Not knowing what you were doing, I tried to get one all by myself (tests at home, now I'm at work): I don't think I'm even close to my aim, but "luck helps the mighty" (as we say it in Italy).

I was wondering how I could use your cool shaders: I know that absorption is strictly related to the width/thickness ob the object, so if my "juice volume" is different from yours, Suv, I'll obtain a different result, isn't it? Acually, a darker one..
How will I be able to adjust it within sketch?
Whaat? Shall I simply adjust the opacity value?

Whaat · Post by **Whaat** » Tue Jun 30, 2009 4:08 pm

Finally finished my orange juice material.

Maybe you'll try it in your 'morning' scene, Pibuz?

I had a rendered image of the juice in a cup, but I lost it...

Pibuz · Post by **Pibuz** » Tue Jun 30, 2009 10:19 pm

Hey whaat! It seems SO nice! I'm trying that now!
Thank you!

Pibuz · Post by **Pibuz** » Wed Jul 01, 2009 12:39 am

Immediately tried your material Whaat, thank you!
At the moment it seems like some kind of..liquid marker by the way

I think it'll need some more tweaking..

Now tell me: I've understood the colour you gave, the opacity value, the IOR..but I can't get the 60 as the value of SSS. Which values shall I play between? 0-1000? One number or RGB values? Give me some hint I BEG YOU! IT'S DRIVING MEEE CRAZZZZZYYYYYYY!

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