[qrk5]

can you make a glass material using just a single surface(no thickness)?
I seem to either make it invisible or it is opaque. I can see that using real light it may always require an actual thickness in the model is this
a correct assumption.

[Bubbaloo]

If you put a glass material on a single plane, then it will calculate infinite refraction = scary results. Model glass how it is in reality.

You may be able to apply AGS to single plane geometry, I haven't tried it.

[qrk5]

thanks babbaloo, thats what I thought might be the case.

[jo]

You may be able to apply AGS to single plane geometry, I haven't tried it.

I'd like to know the answer.
I applied AGS to a 2 faces glass in an interior render, but it was really long to clean. So I started to think that it's better to have only one polygon: can somebody shortly confirm this?

TIA, Gio

[Mihai]

Yes, you can use AGS on single surfaces. AGS has two components, one 'ghost' which renders invisible (transmittance at 255, and ND at 1), and a solid reflective layer to provide reflections, but since this layer doesn't have any transmittance it doesn't refract either, it just bounces off the surface. It just makes reflections, so you don't have to use a solid surface for AGS. If you have refractive materials, then you need a two sided surface so Maxwell knows when light enters and leaves the object to make a proper refraction.

[Bubbaloo]

Ok, Mihai, how about this:
Should AGS be used for solid geometry, too?
Any drawbacks to using AGS on a solid instead of a surface?
Thanks!

[jo]

Yes, you can use AGS on single surfaces. AGS has two components, one 'ghost' which renders invisible (transmittance at 255, and ND at 1), and a solid reflective layer to provide reflections, but since this layer doesn't have any transmittance it doesn't refract either, it just bounces off the surface. It just makes reflections, so you don't have to use a solid surface for AGS. If you have refractive materials, then you need a two sided surface so Maxwell knows when light enters and leaves the object to make a proper refraction.

Thank you Mihai, really helpful!


Ciao, Gio

[Mihai]

Any drawbacks to using AGS on a solid instead of a surface?

I can't think of any.....perhaps that it can slightly increase rendertime but I'm not sure.