Weird Square reflection on glass

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Old 01 January 2014   #1
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
Old 01 January 2014   #2
Are you talking about how jagged "table" edge is (that is seen through the glass). That looks like a problem with glass geometry.
Old 01 January 2014   #3
Yep, that looks like a geometry issue. Can we see wires & modifier stack?
Old 01 January 2014   #4
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".
Old 01 January 2014   #5
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.
Old 01 January 2014   #6
Do you have correct smoothing groups?
Passion is the key.
Miysis 3D
Old 01 January 2014   #7
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
Old 01 January 2014   #8
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.
The Z-Axis
Old 01 January 2014   #9
Thanks to everyone, it was a problem with the smoothing groups, here's the new render. There's no more square or weird reflection

Old 01 January 2014   #10
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 ?

Old 01 January 2014   #11
Looks like it might be an issue with your shadow settings.
What kind of shadows are you using, and what are their settings?
Debris Maker
Old 01 January 2014   #12
Perhaps try lowering the Cutoff value in the VRayMtl options.
Old 01 January 2014   #13
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.
Old 01 January 2014   #14
Thank you, here's my scene :!BsRnibqJ!a2e1Y...3A9eaJBW8 aT4o

Old 01 January 2014   #15
It seems to be rendered in an orthographic view, change to perspective and see if the problem solves.
Back to the university...
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