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Vray 3.5 Beta - Problem with VrayFastSSS2 material + Adaptive Lights

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  • Vray 3.5 Beta - Problem with VrayFastSSS2 material + Adaptive Lights

    I'm getting strange results when rendering VrayFastSSS2 materials with Adaptive Lights. Please check the screenshots below as well as the 3ds max scene for inspection.

    Click image for larger version

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    Attached Files
    Aleksandar Mitov
    www.renarvisuals.com
    office@renarvisuals.com

    3ds Max 2023.2.2 + Vray 7
    AMD Ryzen 9 9950X 16-core
    64GB DDR5
    GeForce RTX 3090 24GB + GPU Driver 565.90

  • #2
    I get nothing when I render the scene as you sent it. Can you please check it ? Also can you try rendering it with the SSS multiple scattering set to "Raytraced" ?
    If it was that easy, it would have already been done

    Peter Matanov
    Chaos

    Comment


    • #3
      Sorry, I've enabled the light include list by mistake. Just go to the Exclude option of the lights and make sure the button Exclude is active, not Include.

      Anyways, I tried Raytraced for the material and the issue still persists.
      Aleksandar Mitov
      www.renarvisuals.com
      office@renarvisuals.com

      3ds Max 2023.2.2 + Vray 7
      AMD Ryzen 9 9950X 16-core
      64GB DDR5
      GeForce RTX 3090 24GB + GPU Driver 565.90

      Comment


      • #4
        Ok, seems like a bug. Thanks !
        If it was that easy, it would have already been done

        Peter Matanov
        Chaos

        Comment


        • #5
          Thanks a lot for the report! Will fix it for beta 2. In the meantime, the VRayALSurfaceMtl material works fine.

          Best regards,
          Vlado
          Last edited by vlado; 10-12-2016, 03:41 PM.
          I only act like I know everything, Rogers.

          Comment


          • #6
            Can get me some more specific reproduction steps? It seems to work fine for me in a simple test.

            Best regards,
            Vlado
            I only act like I know everything, Rogers.

            Comment


            • #7
              Originally posted by vlado View Post
              Can get me some more specific reproduction steps? It seems to work fine for me in a simple test.

              Best regards,
              Vlado
              Please check the attached scene (don't use the one in my 1st post, I forgot to set it up properly for the test). Just load this new scene in Max and hit render. I tested it on 2 workstations and on both Vray renders the SSS object with black patches like in my first post if Adaptive lights is used.
              Attached Files
              Last edited by Alex_M; 11-12-2016, 12:49 PM.
              Aleksandar Mitov
              www.renarvisuals.com
              office@renarvisuals.com

              3ds Max 2023.2.2 + Vray 7
              AMD Ryzen 9 9950X 16-core
              64GB DDR5
              GeForce RTX 3090 24GB + GPU Driver 565.90

              Comment


              • #8
                Ok, yes I can see the issue. Like I said will fix it; in the meantime you can use the VRayALSurfaceMtl material.

                Best regards,
                Vlado
                I only act like I know everything, Rogers.

                Comment


                • #9
                  Now that the changelog of Beta 2 is released, I took a quick peek at it and found a couple of things that are still not working for me. One of them is the problem with VrayFastSSS2 materials and Adaptive lights. Maybe I'll have to check out the ALSurface material as a workaround for the time being as you suggested.

                  The image below is a test with Beta 2:

                  Click image for larger version

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                  From the link above:
                  Originally posted by alexander.kazandzhiev View Post
                  Hello,
                  Here is the changelog:
                  Build 3.50.02 (beta) (11.01.2017)
                  ==============

                  Bug fixes:
                  ...
                  (*) V-Ray: Artifacts with adaptive lights and VRayFastSSS2 material;
                  ...
                  Last edited by Alex_M; 14-01-2017, 07:17 PM.
                  Aleksandar Mitov
                  www.renarvisuals.com
                  office@renarvisuals.com

                  3ds Max 2023.2.2 + Vray 7
                  AMD Ryzen 9 9950X 16-core
                  64GB DDR5
                  GeForce RTX 3090 24GB + GPU Driver 565.90

                  Comment


                  • #10
                    The fix is applicable only for Raytraced scattering of the VRayFastSSS2. Try to avoid the prepass mode, it can lead to undesirable effects with the new algorithms.
                    If it was that easy, it would have already been done

                    Peter Matanov
                    Chaos

                    Comment


                    • #11
                      Ok, got it. It does work fine with raytraced scattering. I'll try to remember to avoid prepass mode with Adaptive lights.

                      By the way, this particular scene has 150 lights and renders 3 times faster with Adaptive lights. Good job!
                      Last edited by Alex_M; 16-01-2017, 03:22 AM.
                      Aleksandar Mitov
                      www.renarvisuals.com
                      office@renarvisuals.com

                      3ds Max 2023.2.2 + Vray 7
                      AMD Ryzen 9 9950X 16-core
                      64GB DDR5
                      GeForce RTX 3090 24GB + GPU Driver 565.90

                      Comment


                      • #12
                        Nice

                        We will think of a way to warn the users about the prepass+AL.
                        If it was that easy, it would have already been done

                        Peter Matanov
                        Chaos

                        Comment

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