Green Glass Help

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ideas_arte
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Green Glass Help

Post by ideas_arte » Tue Sep 22, 2009 9:06 pm

Good day gentlemen.

I'm fascinated by Indigo, even though I am inexperienced and lacks many things to learn.

I need to create a material like glass or like this:

Image

First try assigning TintedGlass, but not like when you go up the value to reflect
begins to look like metal and is not what I need.

I went to try some MaterialDataBase and materials here (Topaz, Emerald, SafetyGlass)
but none helped me.
I'm using Skindigo 2.012b • SketchUp 7 • Mac OSx 10.6.1 • and made the change on file extension .PIGM by. IGM

Could someone help me?


In advance many thanks.

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Borgleader
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Re: Green Glass Help

Post by Borgleader » Tue Sep 22, 2009 11:25 pm

Dont change the file name from .pigm to .igm, you have to extract the .igm from the .pigm (.igm = indigo material, pigm = packed indigo material)
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PureSpider
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Re: Green Glass Help

Post by PureSpider » Tue Sep 22, 2009 11:28 pm

You need to higher the absorption instead of the reflection value tu make it more green.

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Borgleader
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Re: Green Glass Help

Post by Borgleader » Tue Sep 22, 2009 11:36 pm

PureSpider wrote:You need to higher the absorption instead of the reflection value tu make it more green.
Yes, forgot to mention that earlier, or I think you can increase the gain value. You can always test your changes with the preview function and render once you're happy with the results :)
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dakiru
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Re: Green Glass Help

Post by dakiru » Tue Sep 22, 2009 11:41 pm

Hi ideas_arte. Try this one: specular transparent material with IOR 1.57 and "your green color" absorb gain 5.0. Here what i've got with these settings in Blendigo (1.4m x 2m x 0.008m) :
green_glass.png
green_glass.png (227.96 KiB) Viewed 3982 times

Code: Select all

<?xml version="1.0" encoding="utf-8"?>

<scenedata>
	<medium>
		<name>green_glass</name>
		<precedence>10</precedence>
		<basic>
			<ior>1.57</ior>
			<cauchy_b_coeff>0</cauchy_b_coeff>
			<absorption_coefficient_spectrum>
				<rgb>
					<rgb>5 2.13177 3.34433</rgb>
					<gamma>2.2</gamma>
				</rgb>
			</absorption_coefficient_spectrum>
		</basic>
	</medium>
	<material>
		<name>green_glass</name>
		<specular>
			<transparent>true</transparent>
			<internal_medium_name>green_glass</internal_medium_name>
		</specular>
	</material>

</scenedata>

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Whaat
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Re: Green Glass Help

Post by Whaat » Wed Sep 23, 2009 1:57 am

The tinted glass preset in SkIndigo (like all media) requires that you model your glass true scale. If your glass is about 8mm-13mm thick it should look fine. If you want more color, increase the opacity slider in the SketchUp material editor. This is like increasing the 'gain' of the absorption.

Also, PIGM importing does not work yet on Mac. You have to first extract the IGM and then you can load it into SkIndigo.

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ideas_arte
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Re: Green Glass Help

Post by ideas_arte » Wed Sep 23, 2009 3:44 am

Many, thank you very much!
I learned a lot today.

I am indebted boys.

@ Whaat: just gave it right. Now everything is perfect.

Although I came another question, or is it a bug?
with Eneable Aperture Diffraction is more evident:
Image

I'll publish it in the appropriate section.


Greetings.

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benn
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Re: Green Glass Help

Post by benn » Wed Sep 23, 2009 8:47 am

Ideas, they are called fireflies, you can sometimes fix them by rendering with metropolis raytracing off.

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ideas_arte
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Re: Green Glass Help

Post by ideas_arte » Wed Sep 23, 2009 11:55 am

benn wrote:Ideas, they are called fireflies, you can sometimes fix them by rendering with metropolis raytracing off.
Thanks Mr benn, not like turning off the Metropolis Raytracing.
What I did was change the method:
Image

And this was the result:
Image



Thank you very much again.

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cpfresh
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Re: Green Glass Help

Post by cpfresh » Wed Sep 23, 2009 2:57 pm

great looking glass ideas_arte. what we need now is a shader that will give the glass that slight wave that sheet glass gets.

edit* actually whaat's water shader would probably work great at the right scale.

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zeitmeister
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Re: Green Glass Help

Post by zeitmeister » Wed Sep 23, 2009 6:29 pm

Sorry, what do you mean with "wave"?
Maybe a large, subtle noise as a bumpmap could do the trick?
Cheers, David



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CTZn
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Re: Green Glass Help

Post by CTZn » Thu Sep 24, 2009 3:25 pm

Any smooth and subtle bump, to break with flatness ;)

Looking forward to that shader test !
obsolete asset

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galinette
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Re: Green Glass Help

Post by galinette » Sun Jan 10, 2010 12:28 am

Nice render.

I may provide soon some "real" coated architecture glass models soon (check my new topic). These glasses are very difficult to physically reproduce if you do not have the data, but you have found some esthetic hacks to give good look.

These glasses have surfacic spectrally dependant reflection, transmission and absorption due to the coating. They are asymetric (reflection color is very different on both sides). And aditionnaly, the glass medium absorbs some colors too.

As soon as there is no intellectual property issues, I should be able to provide materials for real building coated glass (I have acces to all these datas)

Regards,

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

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CTZn
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Re: Green Glass Help

Post by CTZn » Wed Jan 13, 2010 10:25 am

obsolete asset

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