[Asmithey]

I have seen this is several of my images in the reflections. Interior and exterior. You can see it in the windows.

Any ideas?

[Fernando Tella]

Funny!

There's no texture in the glass material, true?

[m-Que]

I would say it has something to do with material settings or glass geometry - notice how it represents the POV as it would be 'photographer'

[Asmithey]

Nope...Just ags glass.

[m-Que]

Just AGS from wizard?
Hmm... ok, what will happen if you replace that glass geometry with a simple plane (one from the 'Studio primitives')?

[m-Que]

BTW, I hope it's not some sort of double/triple glazing?

[Asmithey]

it is a simple 1" thick pane with ags. It justed started doing this on my last few jobs using form-z. I have not noticed using Blender though.

[Fernando Tella]

Maybe it has something to do with camera ranges?

[choo-chee]

my guess is (I don't know your software but) that maybe a clip plane in the camera settings is causing that. like it's clipping the surrounding sphere and you get a circle in the POV.

[zdeno]

fresnel

[tom]

What happens when you hide everything else and render the glass alone?

[zdeno]

solved ?

[Asmithey]

Sorry, I have not checked this post in a while. I have not tried to sove it. I will do as Tom says and see what happens. In the mean time I finished the project in Blender and everything rendered fine. No circle. So....It was only doing this in Form-Z to Maxwell Render.

[zdeno]

thank you for sharing .
still curious what gives this funny circle

[bograt]

I don't think its the glass, I have had this as well.
I am sorry for mentioning this as I do not know what causes it but I have noticed this appearing on my renders before.
Are you using c4d? Strangely I have noticed something similar occurring to my stitches in ptgui which is just bizzare...
does this occur in fire?