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material: glass material applied to some faces


smr_VIZ
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In autocad, to save the memory, I modeled a face for a glass. Then I applied a glass mat.( with ref. set to light grey) to it in MAX. Now here comes the trouble. Some glasses' normal seems being changed. I couldn't see the glass mat. anymore. If I model in solid, problem dismissed.

 

I wonder if it is the video card driver cause this issue?

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you mean in the viewport or the render?

If you can't see it in the viewport is simply a display setting. All you have to do is to select the glass object and right click - object properties and disable the "backface culling" option

if it does not show on the render, you should check in your vray material - options tab - double sided. One important tip: if you plan on using single faces for the glass, you might end up with incorrect refractions. basically the rays go in the glass and since htey cant find "the ohter end" there is a very strong lens effect that gives you a very weird refraction. to fix it you can one of the following things:

a- set you IOR to 1 in you material

b- apply a shell modifier to whatever you think is the thickness of the glass.

 

hope this helps.

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\if it does not show on the render, you should check in your vray material - options tab - double sided. One important tip: if you plan on using single faces for the glass, you might end up with incorrect refractions. basically the rays go in the glass and since htey cant find "the ohter end" there is a very strong lens effect that gives you a very weird refraction. to fix it you can one of the following things:

a- set you IOR to 1 in you material

b- apply a shell modifier to whatever you think is the thickness of the glass.

 

hope this helps.

 

I guess you would always model a solid for the Glass object then? The optionA won't give me the correct rendering effects for the glass. Option b won't reduce the rendering time, I suppose?

 

It seems MentalRay don't have such problems?

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