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Re: jittering in animation interfaces glass\liquid

Posted: Thu Apr 16, 2015 3:48 am
by abstrax
This is the tweaked version. The glass has been moved down a bit, to reduce the overlap between glass and liquid. I also tweaked the material and kernel settings. The streaks are a bit less pronounced, but unfortunately not by much:
liquid_anim_4.mov
(9.85 MiB) Downloaded 2554 times
That's the scene file - using the assets you sent to me a while ago:
liquid_glass_0006.ocs
(55.68 KiB) Downloaded 233 times

Re: jittering in animation interfaces glass\liquid

Posted: Thu Apr 16, 2015 11:47 am
by mikinik
abstrax wrote: Thanks for that. I eventually realized that you were talking about the streaks at the bottom of the glass...

yes, that's about it.
abstrax wrote: I think (but I'm not 100% sure here), that in Vray this effect is less strong, because they keep track of the IOR of intersecting volumes, thus reducing reflections and refractions at the intersections of the different media.
vray not have this problem, but, render times longer.
abstrax wrote: We will have a look at it, but I'm not sure when we can solve the problem, since it's a more fundamental issue.
I now have hope. )
abstrax wrote: If there is any way to make the particle mesh as smooth as the glass, you can work around the issue for now, but I'm not sure if that's possible. Another thing you can do to reduce the problem is making the intersection between the liquid and the glass as thin as possible (moving the glass down by -0.05, helped a bit).
thanks for the advice, I will try.
abstrax wrote: This is the tweaked version. The glass has been moved down a bit, to reduce the overlap between glass and liquid. I also tweaked the material and kernel settings. The streaks are a bit less pronounced, but unfortunately not by much:
thanks again, I'll have a look! :)

Re: jittering in animation interfaces glass\liquid

Posted: Thu Apr 16, 2015 9:09 pm
by mikinik
abstrax wrote: As I said in the 2.21 release thread, if the Alembic file has vertex speeds, it renders it. As far as I know (and I don't know much about the 3ds max API), there is no way to fetch vertex speeds from a 3ds max mesh. Dmitry will have a look at it, when he's got some time available
abstrax, in 3ds max 2016 there is support for velocity channel in alembic file!!! hope can quickly fix motion blur, when you'll do a plug-in for 3ds max 2016. :)