How to render clear glass?

[Klaustastrophe]

Hey guys,

I'm quite desperate currently as I'm spending hours with different settings to finally get this to work.
As you can see below I'm trying to render a lens via F360.
Even though the preview display the glass (no matter what material) flatt/smooth, as soon as I render I get the weird artifacts/texture below.

Like this. I can overlap the glass element with the one behind, setting dielectric priority from front to back... nothing.
Am I too stupid to use F360 instead of Keyshot? I mean... if I compare preview and render, I feel like I'm better off using the preview instead...

Also can someone point me please to a good render tutorial? The option rendering for seconds without an estimate on finals gets me mad af.
Also WHY does F360 abort rendering as soon as I like move the window to my 2nd screen? I feel dumb af cause I never had those issues anywhere else.

Thanks a lot and best regards!

A noob.

[TrippyLighting]

Is there a chance you can share the model? (link to it from data panel, or export as .f3d and attach).

This is difficult to analyze without having access to the model. The artifacts might simply be that the render hasn't cooked long enough and simply needs more time to resolve.

[Klaustastrophe]

Sure - Thanks in advance!

[TrippyLighting · Accepted solution]

It looks to me that al the glass surfaces are perfectly aligned and that isn't going to work.
The artifacts you are seeing are due to Z-Fighting.

For the dielectric priority control to work the volumes have to overlap. In this case, I'd offset the surfaces (press-pul tool) maybe by 0.1 - 0.2mm until the artifacts disappear.

[Klaustastrophe]

Thanks! The press-pul tool and 0.2mm did the trick! 🙂