Weird Square reflection on glass

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  01 January 2014
Weird Square reflection on glass

Hello !

I have a problem with 3dsmax and mental ray : When I create a cilinder with the material autodesk glass and put something in, it create weird square reflection. I tried to disable FG or put it on high nothing change. And I have pretty much tried every option I know.

Does someone can help ?

Here's the screen :

Thank you.

3dsmax 2014 and mental ray used with Daylight system and mr photographic
 
  01 January 2014
Are you talking about how jagged "table" edge is (that is seen through the glass). That looks like a problem with glass geometry.
 
  01 January 2014
Yep, that looks like a geometry issue. Can we see wires & modifier stack?
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  01 January 2014
Yes, as you can see the yellow slab inside the glass is also affected. The glass isn't smoothed but if I smooth it, there's still these edge, but it looks just more "precise".
 
  01 January 2014
Here's the screen of the wire and modifier :




As you can see it's basic.



And here's a smoothed version of the glass :




You can see how the reflection are and it's not normal I think.
 
  01 January 2014
Do you have correct smoothing groups?
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  01 January 2014
I think I should watch some tutorials on smoothing groups then. I'm a begginer and I don't know how to use it, I just use NURMS in polygon modeling


Well thank you
 
  01 January 2014
First render issue is probably a lack of smoothing groups. Second issue is that the big polygon inside the bottom of the glass is causing the issue because it's an n-gon, try inset it a bit and that should fix the problem.
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  01 January 2014
Thanks to everyone, it was a problem with the smoothing groups, here's the new render. There's no more square or weird reflection

 
  01 January 2014
Well I thought it was fixed on now it's on the cylinder ...

Can someone explain me why I have these square on my material which very basic please ?






Thanks
 
  01 January 2014
Looks like it might be an issue with your shadow settings.
What kind of shadows are you using, and what are their settings?
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  01 January 2014
Perhaps try lowering the Cutoff value in the VRayMtl options.
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  01 January 2014
Originally Posted by PelDaddy: Perhaps try lowering the Cutoff value in the VRayMtl options.


He's using Mental ray.

Nodraw, just share the scene, someone will take a look at it.
 
  01 January 2014
It seems to be rendered in an orthographic view, change to perspective and see if the problem solves.
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