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Share => Materials and Textures => Topic started by: DeteZvezda on March 06, 2011, 07:46:20 AM

Title: Plexiglass
Post by: DeteZvezda on March 06, 2011, 07:46:20 AM
Hello.

I am trying to get the plexiglas material right. This is the best i can do, but its not accurate enough. I am using Solid Glass with IOR 2.38. Does anyone have a better material...

TNX

(http://s4.postimage.org/1yuy3xbfo/001.jpg) (http://postimage.org/image/1yuy3xbfo/)
Title: Re: Plexiglass
Post by: guest84672 on March 06, 2011, 08:06:57 AM
I suggest using the Gem or Dielectric materials. You want control over the Abbe number. The Abbe number gives you the dispersion that you see in plexiglass.

Use the following settings:

IOR - 1.5 - 1.51
Abbe - 34

Increase your raybounces in the realtime tab (12 should be enough), and turn on "detailed indirect illumination".

I found these numbers on the internet.


Hope this helps.

Thomas
Title: Re: Plexiglass
Post by: DeteZvezda on March 06, 2011, 08:59:19 AM
Thanks for a quick reply. It get better. Still i get the black edges, and the color is white...

(http://s3.postimage.org/2dvk418ec/002.jpg) (http://postimage.org/image/2dvk418ec/)

I am trying to make sompting like this ...

(http://s3.postimage.org/2e17j4x50/003.jpg) (http://postimage.org/image/2e17j4x50/)
Title: Re: Plexiglass
Post by: guest84672 on March 06, 2011, 09:46:06 AM
Increase your raybounces. It also depends on your lighting.
Title: Re: Plexiglass
Post by: DeteZvezda on March 06, 2011, 09:56:29 AM
They are at 32...  :-\
Title: Re: Plexiglass
Post by: Burkhard on March 06, 2011, 10:01:58 AM
Change your light settings similar to your original.
The reflections of the blueish Background is what you see.
Title: Re: Plexiglass
Post by: DeteZvezda on March 06, 2011, 10:10:13 AM
I try that too. Blue is just a backround color, enviroment is pure white HDR file...
Title: Re: Plexiglass
Post by: guest84672 on March 06, 2011, 10:26:51 AM
(http://www.keyshot.com/images/Plexiglass.jpg)

32 raybounces
detailed indirect illumination checked
default HDRI lighting
Ground shadows turned off
Gem material - IOR 1.51, Abbe 34

The dark reflections you see is from the reflection of the environment.

How's that?

Title: Re: Plexiglass
Post by: DeteZvezda on March 06, 2011, 11:23:05 AM
 :) ... U sure showed me ...  :) .

Thanks a million ...  ;D
Title: Re: Plexiglass
Post by: guest84672 on March 06, 2011, 10:39:22 PM
Glad to hear it helped!!
Title: Re: Plexiglass
Post by: DeteZvezda on March 08, 2011, 07:14:29 AM
It seams that problem is not solved. Sendig the example...

(http://s2.postimage.org/1i4zq4sdg/001_4.jpg) (http://postimage.org/image/1i4zq4sdg/)

Here is the link to a file. If someone can get it right, i wold like to see it... :)

http://www.sendspace.com/file/z0ux5x
Title: Re: Plexiglass
Post by: JeffM on March 08, 2011, 04:11:26 PM
Depending on the angle you view your model at, 32 ray bounces may not be enough to illuminate all the edges. Try outputting a render with the bounces set to 64.
Title: Re: Plexiglass
Post by: DeteZvezda on March 09, 2011, 05:46:41 AM
 ;D ,  ;D

Thank you ALL... I O U 1 ...  ;)

(http://s2.postimage.org/1vqr2jp2c/003.jpg) (http://postimage.org/image/1vqr2jp2c/)
Title: Re: Plexiglass
Post by: JeffM on March 09, 2011, 09:40:20 AM
Looks great! I'm glad we could help :)
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