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  • Reflection, IOR, Posting on other sections

    I've been reading some stuff about materials on this this (http://www.workshop.mintviz.com/tuto...terials-guide/)
    and it mentioned something about IOR, the only problem is it's in the context of an older version which has only has Fresnel IOR in contrast to 2.0 that has both 'IOR' and 'Refract IOR'. What's the difference between the two?

    I also read on the same site that for 'one-plane' glass (which is what I'm using on the model I've downloaded), i should use an IOR of 1.0. I've tried setting both IORs under fresnel to 1.0 to no avail. (I've also tried the default 1.55 IORs and I still can't get the gloss I want on the glass)
    This is what I get:

    This is what I want to get:

    Note the reflection of the chair on the glass and its gloss as compared to my render.

    I've downloaded the model online in an effort to practice v-ray, they provided the model and a render in v-ray.

    -------

    Also, I have trouble posting on other sections.
    http://forums.chaosgroup.com/showthr...rouble-posting
    The thread above instructs me to go here (http://www.chaosgroup.com/en/2/additionalUserInfo.html) but all I see is this
    Sketchup 15.2.6 Pro, 64-bit
    Vray 2

  • #2
    Also note that in my render, the background is refracted in an annoying manner.
    Sketchup 15.2.6 Pro, 64-bit
    Vray 2

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    • #3
      My advice would be keep it simple. I suspect that your glass has thickness and maybe no reflection layer on the inside face.

      I would make the glass a simple single layer (sometimes called 'architectural glass') and make sure it has a reflection layer. You can adjust the reflection level in the material. This should get the effect you are after.

      David
      Sketchup 2015
      Vray version 2.00
      www.davidcauldwell.co.uk

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      • #4
        Thanks, I was able to get what I want tweaking the IORs a little bit and increasing the Ref multiplier. And there was a problem in the glass per se, I simply replaced them.
        I still don't get the difference between the three IORs though.
        For example, If I refer to this chart (http://en.wikipedia.org/wiki/List_of_refractive_indices), is it only applicable to the IOR setting under the Refraction layer or are they applicable to the IORs under the Fresnel maps of Reflection?
        Sketchup 15.2.6 Pro, 64-bit
        Vray 2

        Comment


        • #5
          Don't know if it helps, but I think you need to give the glass material to both front and back faces of the glass object.
          AMD Ryzen 9, RTX 2080Super, ArchiCAD 24, Vectorworks 2020, Sketchup 2021 Pro, Vray Next for Sketchup, Skatter, Twinmotion 2020

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          • #6
            if you are having trouble posting on our forum, please contact support@chaosgroup.com
            Best regards,
            Devin Kendig
            Developer

            Chaos Group

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