Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: aslanygh on 2016-01-03, 18:10:02

Title: Invisible refractive objects aka glass make a hole
Post by: aslanygh on 2016-01-03, 18:10:02
Why in default refraction mode and caustics on mode invisible refractive objects taking a hole?
Title: Re: Invisible refractive objects aka glass make a hole
Post by: romullus on 2016-01-03, 19:23:17
By saying invisble you mean non renderable via object properties or through rayswitch material?
Title: Re: Invisible refractive objects aka glass make a hole
Post by: aslanygh on 2016-01-03, 19:35:03
via opacity in material editor, btw using visibility in object properties gave same result, and i did't use rayswitch material
Title: Re: Invisible refractive objects aka glass make a hole
Post by: romullus on 2016-01-03, 20:12:59
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.
Title: Re: Invisible refractive objects aka glass make a hole
Post by: aslanygh on 2016-01-03, 20:22:04
it's for animation, glass object will be invisible at start and then his visibility goes up to 100
Title: Re: Invisible refractive objects aka glass make a hole
Post by: romullus on 2016-01-03, 20:35:50
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.
Title: Re: Invisible refractive objects aka glass make a hole
Post by: maru on 2016-01-04, 12:40:36
Any chance for an example scene where this happens? You can also send a ticket at https://coronarenderer.freshdesk.com/support/tickets/new
Title: Re: Invisible refractive objects aka glass make a hole
Post by: romullus on 2016-01-04, 14:00:34
Will this suffice?
BTW, try to override direct visibility and/or refraction enviroments - some really unexpected results here.
Title: Re: Invisible refractive objects aka glass make a hole
Post by: maru on 2016-01-04, 15:35:03
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.