Glass on model renders gray

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Old 05 May 2013   #1
Glass on model renders gray

I am having an issue when rendering. I have a Nurbs plane with a mia_miss, glass shader preset selected. When I render the surface the surface renders gray (see attached file). I am using Maya 2013, mental ray, 3 area light set up (top, left & right). Any help is appreciated .

Thanks for your time,
-Kassun
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File Type: png Screen Shot 2013-05-03 at 3.56.39 PM.png (17.9 KB, 21 views)
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Old 05 May 2013   #2
Is your geometry imported, such as an .obj file? By default, those imported objects will NOT have "Visible in Reflections" and "...in Refractions" turned on. You'll need to turn those on, if that's the case.

Otherwise, I think we'll need a bit more info? Can you screenshot your shader? Can you test the shader in another scene on, say, a sphere or something simple?

Also, it could be your surface normals.
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Old 05 May 2013   #3
The geometry is an obj exported from Solidworks. I did go in and enable Reflections & Refractions but no luck. I am going to look into the normals. I am also having issues with the geometry around the screen bevels. There is a weird black shadow that is mucking up the clean line.
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File Type: png Screen Shot 2013-05-07 at 2.16.12 PM.png (39.8 KB, 11 views)
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Old 05 May 2013   #4
Thumbs up

InfernalDarkness: I was able to solve my problem with your suggestion. Thanks for your help. Sorry it's been a late reply, it's been a tad busy around here.
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Old 05 May 2013   #5
Happy to help! Nobody knows why the .obj format importer does this, and it always has (back to Maya 6, anyway), but after awhile you just get used to "fixing" your imports. If you have many objects to set these two attributes on, select them all and use the Attribute Spreadsheet, Render tab, click the Attribute at the top and press "1" to set them all at once.
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Old 05 May 2013   #6
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