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why can i see the alfa with VRAY glass?


Tommy8
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I think you are referring to having non-opaque materials affecting the alpha map based on their opacity? For example a glass material that is 50% opaque, would show as mid-grey in the alpha channel? What I do for that is under the matte properties, set the alpha contribution of the material or object to -1.

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kippu hi,

 

when i render image of interior with windows, i want to save the image as TGA format and than in Photo shop i pick the alpha Chanel and i can put any image in the background, with no effecting on windows.

it's all good in scanline, but in vray glass i have some problam, the TGA format can't find the alpha chanel.

 

Clifton Santiago , it's sound intresting i will check this up.

thenx.

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  • 2 years later...
click the "afect alpha" in the glass on material editor

 

hi, im new here, very cool board with questions and answers thats helpful.

 

regarding this glass thing,,, im rendering a wineglass in vray and i checked the "affect alpha" in material editor,so i could be able to place the glass in front of some other stuff in photoshop, like the guy with the window also wanted,, but all i get is a kinda hard white outline of the object in the alpha layer ,and close to black colour/dark grey in middle of object,, i would like the sunshine to be put in the alpha aswell cuz u shouldnt be able to see completely thru where sun shines on some glass stuff? or something,,,, im sure my present alpha miss something hm,,,, a solution would be really nice,, so many buttons and settings:)

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here is the glass, in real life i suspect that it should not be possible to see completely thru those very dark areas,nor the white light reflection areas, so just wonder if max "know" where i should be able to see thru, and how it could fix the alpha so its getting right ,so i could be able to see stuff behind it in a correct way in photoshopglass.jpg

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