View Full Version : Refraction index and Alpha channel

03-14-2012, 02:27 AM
I have some stupid question. When rendering a glass board with Refraction index> 1.0 (eg 1.6), so I polygon determines the thickness of the glass reflected in the alpha channel, even if it is behind glass other opaque material. And I do not want. It bothers me that in post-production, when I rendered the object through the alpha channel to give some background.
What am I in the wrong glass material?



Sorry for my English, I use Googel Translate

03-14-2012, 03:47 AM
In Surface Editor > Advanced set Alpha Channel.

03-14-2012, 04:43 AM
Never take the time to ask about this one, so thank you, both of you :)

03-14-2012, 09:27 AM
Yes, I was afraid of - off the glass for the alpha channel, or turn on the 255. Well yeah, but .... only for the case where the glass panels is a different object.
Had a case where a portion of the glass and it was beyond him to see the background, it would have been necessary for this surface alpha. This would mean two renderings - first with the standard alpha Opaciny Surfaces and the second example, the Constant Value in postproces combine it.
Any other ideas?

03-15-2012, 01:59 AM
such a small thing ... that I had been received .... Note that the brackets at the glass panel is the alpha channel correctly, ie white
????? :D