Glass Material with Low specular highlights

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Googog Mogog
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Glass Material with Low specular highlights

Post by Googog Mogog » Mon Apr 11, 2011 4:24 pm

Hello,
I am having a problem with Indigo Glass material can,t find to change the brightness of glass material specular highlights. Anyone knows how to change or lower the specular highlights of glass?

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galinette
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Re: Glass Material with Low specular highlights

Post by galinette » Tue Apr 12, 2011 2:58 am

You need to decrease the index of refraction. Specular reflection coefficient and index of refraction are coupled (fresnel laws)

Etienne
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Googog Mogog
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Re: Glass Material with Low specular highlights

Post by Googog Mogog » Tue Apr 12, 2011 7:34 pm

galinette wrote:You need to decrease the index of refraction. Specular reflection coefficient and index of refraction are coupled (fresnel laws)

Etienne
ok i did it the glass become almost disappear.But here is what i want actually.For example u buy a new glass with 1.7 IOR and then after some days glass become old now the IOR is same 1.7 but specular highlights become low means its less shiny with same IOR.Thats what i want.

Googog Mogog
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Re: Glass Material with Low specular highlights

Post by Googog Mogog » Tue Apr 12, 2011 7:44 pm

galinette wrote:You need to decrease the index of refraction. Specular reflection coefficient and index of refraction are coupled (fresnel laws)

Etienne
Example:
Example.jpg

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galinette
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Re: Glass Material with Low specular highlights

Post by galinette » Tue Apr 12, 2011 9:04 pm

OK

First, make a 50/50 blend of a diffuse and diffuse transmitter material.
Then blend this blended material with the specular glass (nested blend). This blend coefficient could be modulated by a texture or shader, to provide the "non uniform" aging look.

That should give you the chalky/corroded glass look. I'll post a material as soon as I have one

Also : do not use 1.7 IOR, that's way too much for glass and will provide too high reflection. Real glass has IOR around 1.52.

Etienne
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Googog Mogog
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Re: Glass Material with Low specular highlights

Post by Googog Mogog » Tue Apr 12, 2011 10:23 pm

galinette wrote:OK

First, make a 50/50 blend of a diffuse and diffuse transmitter material.
Then blend this blended material with the specular glass (nested blend). This blend coefficient could be modulated by a texture or shader, to provide the "non uniform" aging look.

That should give you the chalky/corroded glass look. I'll post a material as soon as I have one

Also : do not use 1.7 IOR, that's way too much for glass and will provide too high reflection. Real glass has IOR around 1.52.

Etienne
Thanks for your suggestions.
I am waiting for your old glass material. And yes i already made blend into blend materials gives me cool results.
Just a problem with glass material highlight.So i consult here thanks for good support waiting for your kind material :D

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galinette
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Re: Glass Material with Low specular highlights

Post by galinette » Tue Apr 12, 2011 11:22 pm

Here is a first try
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oldglass.png
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Googog Mogog
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Re: Glass Material with Low specular highlights

Post by Googog Mogog » Wed Apr 13, 2011 2:21 am

galinette wrote:Here is a first try
Cool dude :D
But still look quite new:)
I will upload my tries also

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galinette
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Re: Glass Material with Low specular highlights

Post by galinette » Thu Apr 21, 2011 1:48 am

Eclat-Digital Research
http://www.eclat-digital.com

Googog Mogog
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Re: Glass Material with Low specular highlights

Post by Googog Mogog » Thu Apr 21, 2011 6:18 am

This material is looking good but not as old as in real pic. Anyway thanks for that :D

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dag
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Re: Glass Material with Low specular highlights

Post by dag » Thu Apr 21, 2011 8:11 am

Makes indigo 2.6.1 crash and burrrrn. :twisted:

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galinette
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Re: Glass Material with Low specular highlights

Post by galinette » Thu Apr 21, 2011 8:38 am

Effect in the real pic clearly comes from the fact that the brown rusty color in on the inner side of the bottle. Outer surface is neater, only slightly bumpy. So to reach the effect, you need to combine two materials sharing the same medium.
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Googog Mogog
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Re: Glass Material with Low specular highlights

Post by Googog Mogog » Thu Apr 21, 2011 9:55 pm

galinette wrote:Effect in the real pic clearly comes from the fact that the brown rusty color in on the inner side of the bottle. Outer surface is neater, only slightly bumpy. So to reach the effect, you need to combine two materials sharing the same medium.
Thanks but i know of other way to use your material and use my own grunge over it to make it look as i want it to be. U left it shiny thats good for me to use my own dust over it.

Googog Mogog
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Re: Glass Material with Low specular highlights

Post by Googog Mogog » Thu Apr 21, 2011 10:23 pm

galinette wrote:Effect in the real pic clearly comes from the fact that the brown rusty color in on the inner side of the bottle. Outer surface is neater, only slightly bumpy. So to reach the effect, you need to combine two materials sharing the same medium.
Here is my try which i was working on more then 5 days:
dustyglass.png

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