Glass acts weird

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  02 February 2013
Glass acts weird

Hi CGTalk,

I use mental ray for rendering and gave all the glass in this building a mia-material with glass preset.
Now when there is only one layer of glass everything is fine. But now that I have a glass box behind another wall of glass, strange things happen.
You would say that this is because of the trace settings, but I have those set high enough.

Someone has any ideas on what to change?

Thanks!


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  02 February 2013
Anyone?...
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  02 February 2013
Originally Posted by FerryP: Hi CGTalk,

I use mental ray for rendering and gave all the glass in this building a mia-material with glass preset.
Now when there is only one layer of glass everything is fine. But now that I have a glass box behind another wall of glass, strange things happen.
You would say that this is because of the trace settings, but I have those set high enough.

Someone has any ideas on what to change?




Thanks!




Sorry but I might have a tired eyes, can you elaborate what you are expecting to be the outcome of your render, your glass seems to be very reflective and if you have large amount of ray tracing you will get a multiple reflection on the interior mirror.
 
  02 February 2013
Originally Posted by kosingcg: Sorry but I might have a tired eyes, can you elaborate what you are expecting to be the outcome of your render, your glass seems to be very reflective and if you have large amount of ray tracing you will get a multiple reflection on the interior mirror.


The "problem" is that the glass turns white on places where they are overlapping. Multiple reflections aren't the problem, the white areas are.

But I have fixed it...I had to increase both the Raytrace Shadow Attributes from my lightshape AND the Trace Shadow Depth in the render settings.
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  02 February 2013
Originally Posted by FerryP: The "problem" is that the glass turns white on places where they are overlapping. Multiple reflections aren't the problem, the white areas are.

But I have fixed it...I had to increase both the Raytrace Shadow Attributes from my lightshape AND the Trace Shadow Depth in the render settings.


is it a scaled cube or a plane only?
 
  02 February 2013
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