Vray glass issue

[monkeyman905]

Hi this is my first post here!

 

Im new to Vray and im having some trouble with a glass material.

 

As you can see from the image below the glass is making the sky dark out side when it should be bright blue! Im using vraysun, vraysky and vraycamera. The glass is highly reflective aswell!!

 

The glass is a box so it has a thickness! Can anyone help me as to why its darkening the sky?

 

Thanks alot Phil

 

(The light bit of the sky ive taken the glass out to show you the issue)

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Edited August 9, 2008 by monkeyman905

[Stephen Thomas]

A screen grab of your material settings would help.

[monkeyman905]

Thanks for the reply, the settings are below.

 

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[Stephen Thomas]

The lack of light getting through the glass is a result of your diffuse being white instead of black and your fog value is also a little high. I've gone off using fog for window glass tbh. I feel it is best used for solid objects with a volume where you want to show how the colour varies with the thickness. Instead I prefer to just add a tint to the refraction slot. Here's what I usually start with for architectural glass.

[monkeyman905]

Thanks a lot will give it ago straight away and post the results! Thanks for explain your setting aswell and why you use them it helps when learning!

[gvisual2005]

just tryu taking out (unchecking) in yur frsnnel in material

[monkeyman905]

Still no luck unfortunatly! Could it b my vray settings?

 

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[Nic H]

woah stop:

rQMC sampler settings are pretty high!

global subdivs 16 - I normally have this on 1

noise threshold 0.002 - I normally have it on 0.01

 

anyway this is probably unrelated to your glass issue but could it be that glass just looks mirror like when its on that angle with fresnel reflections?

 

it looks fine to me but you could change the black value in the fresnel map to a mid gray to tone down the reflection.

[monkeyman905]

U think its ok? i dunno i just expected it 2be a bit more blue like the sky outside. the glass just seams to darken it to much. Its the same at every angle.

[LukeC]

Have you checked its not a geometry issue?

[monkeyman905]

Its just a box so i cant see why it would be a modeling error, but its acting llike a mirror