Vray Subdivision on vrmesh breaks velocity

Hey!
I am trying to render a meshed Houdini bhclassic sequence (simulated water), converted to vrmesh via ply2vrmesh commandline.
When I load the vrmesh into Maya and try to render it, some of the polys are faceted and render black. So to smooth them out I added a Vray Subdivision to the Shape Node of the vrmesh which then renders fine - however, with that approach it completely kills the velocity / motion blur of the water sequence, which is bad :frowning:

Alternatively I tried to load an alembic from Houdini directly into a vrmesh, but that also breaks velocity, as soon as I am adding Subdivision/Displacement to the mesh.
Also used the -smoothNormals flag in the ply2vrmesh converter to avoid the problem beforehand, but that crashed the converter itself.

This is Vray 3.53.02, Maya 2016 Ext1 + SP6.

Looking for a solution here.. thank you!
Sebastian

EDIT: picture added to illustrate the issue

If you can send me the original Houdini bhclassic to vlado@chaosgroup.com, it will be very helpful to trouble-shoot the issue.

Best regards,
Vlado

Hey Vlado.
thank you for your reply!

Sure, I just sent you a mail via WeTransfer..

Cheers!
Sebastian

Hey Vlado,
did you have a chance to look into this? Any news on this?

Best,
Sebastian

Hi,
we’ve reproduced the bug and it is reported in our system alongside with the crash with the ply2vrmesh tool. We’ll let you know when there is any new information on the development.
Thank you for your feedback.

Thank you shaio!
Looking forward to hearing about a fix for this.

Hello.
Any news on this issue?
It doesn’t seem to work with the latest Vray 3.6 either :frowning:

Hi,
we’re still working on it. Hopefully It will make it for the next hotfix.

Hi,
the issue is fixed in the latest stable nightly builds. You can download and check if the problem still exist on your end and let us know if you still have issues.

Hi shaio,
I did a quick test with the latest nightly and it seems to work fine now with subdivision/displacement AND velocity :slight_smile:

Thank you very much for this!