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Thread: glass in vray that doesn't take a lot of time to render

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    Default glass in vray that doesn't take a lot of time to render

    please help me with glass.

    i want to make an animation,
    glass slows down everything

    do you have a glass that doesn't take a lot of time to render ?

    I don't care about reflections

    thanks.
    Kris.

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    Veteran Member manta's Avatar
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    Default Re: glass in vray that doesn't take a lot of time to render

    Interior or exterior animation ??

    If its an interior then don't use any glass...

    If its exterior then use reflection maps to fake it...

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    Default Re: glass in vray that doesn't take a lot of time to render

    it is for exterior, and I just need it to have some transparency

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    Veteran Member Christopher Nichols's Avatar
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    Default Re: glass in vray that doesn't take a lot of time to render

    What version of Vray are you using? How are you creating your glass?

    Here is a link to get you started, but please post your answers as this may be some common issues which we may be able to help with:

    http://www.vray.info/materialbeta.asp
    Christopher P Nichols

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    Default Re: glass in vray that doesn't take a lot of time to render

    is this glass being calculated faster than regular Vray material?


    I noticed that you can't really change a color, it is either a fully color or transparent, I wanted a little bit of green but it doesn't seem to work.

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    Default Re: glass in vray that doesn't take a lot of time to render

    I'd turn off GI calculation of the glass (vray properties) ...then the light will go thru the windows directly and you only get the glass reflection...it works pretty well in exteriors and interiors.
    -try using IOR 1 for refractions or/and you can reduce the depth 3,3 (refrac, reflec)

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    Veteran Member Christopher Nichols's Avatar
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    Default Re: glass in vray that doesn't take a lot of time to render

    Quote Originally Posted by d7man2000
    is this glass being calculated faster than regular Vray material?


    I noticed that you can't really change a color, it is either a fully color or transparent, I wanted a little bit of green but it doesn't seem to work.
    Yeap... that is what I suspected. Try to avoid using standard max material in general, while they work, they are slower. Also, for transparency, they should be avoided at all cost. Using opacity in a standard material makes vary vety very slow. This is how you do proper glass (in any rendering engine)


    - In your case, use the VrayMat
    - For glass that is transparent (or tinted), it has no diffuse color. Meaning make the diffuse black
    - Add transparency in the refraction (that is opacity in Vray).
    - If the glass is tinted, add color to the refraction
    - If the glass has a slight amount of paint on it, or like a slicky film thing... add color to the diffuse
    - Now Vray will refract glass very very fast. You will notice that with the Vray material and a raytraced refraction, it will still render 10 times faster then a Standard material with opacity and no refraction
    - But if you just want to to blow off the refraction all together, turn off the "trace refraction" in the option of the VrayMat

    Now this is only the begining and only answers your immediate questions. There is a lot more to glass, but give that a a try and see if it helps.
    Christopher P Nichols

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    Default Re: glass in vray that doesn't take a lot of time to render

    Thanks Christopher for the glass help.

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