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  • 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

    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
    Click image for larger version  Name:	vrMesh_Issue.jpg Views:	2 Size:	309.0 KB ID:	964068
    Last edited by selavfx; 15-08-2017, 02:06 AM.
    Sebastian Lauer
    IMDB

  • #2
    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
    I only act like I know everything, Rogers.

    Comment


    • #3
      Hey Vlado.
      thank you for your reply!

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

      Cheers!
      Sebastian
      Last edited by selavfx; 15-08-2017, 04:13 AM.
      Sebastian Lauer
      IMDB

      Comment


      • #4
        Hey Vlado,
        did you have a chance to look into this? Any news on this?

        Best,
        Sebastian
        Sebastian Lauer
        IMDB

        Comment


        • #5
          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.
          Ivan Shaykov
          chaos.com

          Comment


          • #6
            Thank you shaio!
            Looking forward to hearing about a fix for this.
            Sebastian Lauer
            IMDB

            Comment


            • #7
              Hello.
              Any news on this issue?
              It doesn't seem to work with the latest Vray 3.6 either
              Sebastian Lauer
              IMDB

              Comment


              • #8
                Hi,
                we're still working on it. Hopefully It will make it for the next hotfix.
                Ivan Shaykov
                chaos.com

                Comment


                • #9
                  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.
                  Ivan Shaykov
                  chaos.com

                  Comment


                  • #10
                    Hi shaio,
                    I did a quick test with the latest nightly and it seems to work fine now with subdivision/displacement AND velocity

                    Thank you very much for this!
                    Sebastian Lauer
                    IMDB

                    Comment

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