Invisible refractive objects aka glass make a hole

[aslanygh]

Why in default refraction mode and caustics on mode invisible refractive objects taking a hole?

[romullus]

By saying invisble you mean non renderable via object properties or through rayswitch material?

[aslanygh]

via opacity in material editor, btw using visibility in object properties gave same result, and i did't use rayswitch material

[romullus]

Oh, i managed to miss opacity part somehow :]

Initially i thought it's a bug, but i did some quick test on my side and i'm not so sure anymore. It maybe expected behaviour. I think it's one of those grey areas where physical properties meets fakes and their collision doesn't always leaves nice impression :] Let's wait what devs have to say about this.

BTW, unchecking renderable in object properties works as expected.

[aslanygh]

it's for animation, glass object will be invisible at start and then his visibility goes up to 100

[romullus]

OTOH, this could be yet another instance of well known problem with refractive materials in multi sub-object: https://coronarenderer.freshdesk.com/support/solutions/articles/5000516180-known-bugs-and-limitations

Have you tried rayswitch option? Although i doubt it could help here.

[maru]

Any chance for an example scene where this happens? You can also send a ticket at https://coronarenderer.freshdesk.com/support/tickets/new

[romullus]

Will this suffice?
BTW, try to override direct visibility and/or refraction enviroments - some really unexpected results here.

[maru]

Looks really interesting. I have no good explanation for what is going on here, but looking at it intuitively I would say this is the expected result, and it is not a bug (I mean the intersection, not sure about the overrides).

I do not know of any proper way of making one of two intersecting glass objects fade without the "cutout" effect, but I also have trouble imagining what it would look like.