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    Motion Blur Substeps?

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    • RemoGambacciani
      RemoGambacciani last edited by

      Hi guys,
      any idea how to improve the motion blur substeps?

      I would expect the MB of a single matrix (white line) being as smooth as the spline it follows (red line).
      The spline is uniformly subdivided (no render subdiv/smoothing involved).

      Seems like there are missing the subframe information (even when cached...).
      The transformation/deformation steps doesnt seem to help...

      Hint appreciated 🙂
      Cheers, R.

      06013448-8d7f-4003-8936-e8b0487fde04-image.png

      MB_Scene1.c4d

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      • Dr. Sassi
        Dr. Sassi last edited by Dr. Sassi

        Hi RemoGambacciani,

        Please have a look here.
        CV4_2025_drs_25_RSmb_01.c4d

        The Deformer can stretch the line, so the steps become rather large.
        It looks different if you use the Bend deformer with "Keep Length" active.

        All the best

        Dr. Sassi Sassmannshausen Ph.D.
        Senior Trainer, Maxon Master Trainer, L&D - Strategist
        Cinema 4D mentor since 2004, Member of VES, DCS.

        RemoGambacciani 1 Reply Last reply Reply Quote
        • RemoGambacciani
          RemoGambacciani @Dr. Sassi last edited by

          Hi @Dr-Sassi , thx a lot for the quick answer.
          It does change something if you turn it on/off but doesnt seem to have an impact to the low subdiv look, or does it? 🧐

          KeepLegthOn
          KeepLeghthOn.png

          KeepLegthOff
          KeepLeghthOff.png

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          • Dr. Sassi
            Dr. Sassi last edited by Dr. Sassi

            Hi RemoGambacciani,

            If you use my setup, then it is pretty much the same (keep length on or off), as I have set up the deformer in that way,

            Below is a comparison: Green is mine, and Red is the file I got.

            Screenshot 2025-03-17 at 11.18.39 AM.jpg

            CV4_2025_drs_25_RSmb_02.c4d

            In the Red Version, the line is stretched, resulting in the more pronounced step.

            All the best

            Dr. Sassi Sassmannshausen Ph.D.
            Senior Trainer, Maxon Master Trainer, L&D - Strategist
            Cinema 4D mentor since 2004, Member of VES, DCS.

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