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Thread: Glass reflection problem

  1. #1
    Veteran Member alfienoakes's Avatar
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    Default Glass reflection problem

    I have a staircase that has a glass screen next to it. Now the glass is normal fresnel glass, and reflects in most instances how I want it too..

    But, where its is picking up a bright reflection on my floor, it is really over blowing it. Have a look at the image and you will see what I mean.

    Not sure how to stop this, as I dont want the glass any less reflective, nor the floor. The floor wil have a proper map applied, and the glossys will be upped, but other than that, it will stay reflective.

    Any clues would be great. Glass on stairs is as follows

    Diffuse - dark green
    Reflect and refract 255 white, fresnel IOR 1.6 and fog of.01 dark green
    Affect shadows on.

    Thats it really.

    Cheers
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    Andy Wiggins

    MAKING COFFEE.
    Making a cup of coffee is like making love to a beautiful woman. It's got to be hot. You've got to take your time. You've got to stir... gently and firmly. You've got to grind your beans until they squeak. And then you put in the milk.

    Swiss Tony.

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    Senior Member Victor Erthal's Avatar
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    Default Re: Glass reflection problem

    i think what you see there in the reflection is a specular or reflection of the sun in the floor and then reflected in the glass. A small change in the direction of the sun would probably get rid of it.

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    Member onyx's Avatar
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    Default Re: Glass reflection problem

    Quote Originally Posted by alfienoakes View Post
    I have a staircase that has a glass screen next to it. Now the glass is normal fresnel glass, and reflects in most instances how I want it too..

    But, where its is picking up a bright reflection on my floor, it is really over blowing it. Have a look at the image and you will see what I mean.

    Not sure how to stop this, as I dont want the glass any less reflective, nor the floor. The floor wil have a proper map applied, and the glossys will be upped, but other than that, it will stay reflective.

    Any clues would be great. Glass on stairs is as follows

    Diffuse - dark green
    Reflect and refract 255 white, fresnel IOR 1.6 and fog of.01 dark green
    Affect shadows on.

    Thats it really.

    Cheers
    just uncheck the specular setting for the light/s outside of the window. Looks like a v-ray light specular reflection.

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    Veteran Member alfienoakes's Avatar
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    Default Re: Glass reflection problem

    Hey guys,

    Yep.. that would make sense. I forgot to mention it is a Vraysun outside though..

    I could move the sun, but I really wanted to cast some shadows against the staircase.. looks a little more dramatic.. Any other ideas..?
    Andy Wiggins

    MAKING COFFEE.
    Making a cup of coffee is like making love to a beautiful woman. It's got to be hot. You've got to take your time. You've got to stir... gently and firmly. You've got to grind your beans until they squeak. And then you put in the milk.

    Swiss Tony.

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    Member mhmd19732008's Avatar
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    Default Re: Glass reflection problem

    hello
    1-try changing exit color of glass material.
    2-try lowering thickness of glass, i think the problem in the refraction too.
    hope works

  6. #6
    Veteran Member alfienoakes's Avatar
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    Default Re: Glass reflection problem

    Hey Mohammed..

    No luck there.. but I do know what is causing the problem.. I just need to work out HOW to fix it.

    The floor has a glossy reflection to it. If I turn the glossies off, and re-render with normal reflections I have no problems, the glass comes out correct.

    So, it is the floor glossies that is the problem in the glass.... Any clues..

    Cheers
    Andy Wiggins

    MAKING COFFEE.
    Making a cup of coffee is like making love to a beautiful woman. It's got to be hot. You've got to take your time. You've got to stir... gently and firmly. You've got to grind your beans until they squeak. And then you put in the milk.

    Swiss Tony.

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    Veteran Member stef.thomas's Avatar
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    Default Re: Glass reflection problem

    Have you checked the 'invisible' box in the vray sun settings? Or maybe changing the highlight glossiness independantly from the overall glossiness might help.

  8. #8
    Veteran Member alfienoakes's Avatar
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    Default Re: Glass reflection problem

    Hi Stephen,

    Yeah, I tried the invisible sun, and that didnt work, and also tried upping the glossiness of the floor, but still did the same thing.. In fact, I tried loads of settings on each material, max depth, glossy, interpolate.. Nothing seems to make any difference..
    Andy Wiggins

    MAKING COFFEE.
    Making a cup of coffee is like making love to a beautiful woman. It's got to be hot. You've got to take your time. You've got to stir... gently and firmly. You've got to grind your beans until they squeak. And then you put in the milk.

    Swiss Tony.

  9. #9
    Veteran Member alfienoakes's Avatar
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    Default Re: Glass reflection problem

    OK..

    The only thing that I can make work here, is to either set the floor to have no glossy reflections, or, the less glossy they are the better.

    So I will have to render the floor with the glossy as I want it, then re-render a region of the glass, with the glossy set at say .9, then overlay in post.

    Fed up of it now......
    Andy Wiggins

    MAKING COFFEE.
    Making a cup of coffee is like making love to a beautiful woman. It's got to be hot. You've got to take your time. You've got to stir... gently and firmly. You've got to grind your beans until they squeak. And then you put in the milk.

    Swiss Tony.

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