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    Motion Blur causes a black background to appear behind 3D object

    Troubleshooting and Bug Reports
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    • E
      Elton_John
      last edited by Elton_John

      I have a 3D object in my 3D Player, which is displaying on a Renderer which goes into motion blur, then into projector.  The blending mode is on Transparent. For some reason, there's a solid black background behind my object. I found that the only way to get rid of the background is to change the projector blend to Additive ( though I do not want this ), or turn down the decay to 0, which lessens the background--but I don't want 0 decay, either.  I'm unsure what's causing this.  Anyone have any insight?  Also, I know it's the motion blur causing it because it goes away if I delete motion blur. Screenshot below, and thank you!

      markM 1 Reply Last reply Reply Quote 0
      • markM
        mark @Elton_John
        last edited by

        @elton_john

        What is the 3D Model? Is it a rectangle? It would be helpful if you posted it.

        Does your movie have transparency? If not then it's going to be opaque when you texture map it on to the 3D model.

        Best Wishes,
        Mark

        Media Artist & Creator of Isadora
        Macintosh SE-30, 32 Mb RAM, MacOS 7.6, Dual Floppy Drives

        E 1 Reply Last reply Reply Quote 1
        • bonemapB
          bonemap Izzy Guru
          last edited by bonemap

          Hi,

          I was able to recreate that black effect. It is because in the patch indicated you have the 'Motion Blur' / 'decay amt' set to 100. When I do that in my patch I get the same black effect.

          Here it is as a screen capture. I am not sure if it is a bug or just the result of 100% decay amount? @mark?

          Best Wishes

          http://bonemap.com | Australia
          Izzy STD/USB 3.2.6 | + Beta 3.x.x
          MBP 16” 2019 2.4 GHz Intel i9 64GB AMD Radeon Pro 5500 8 GB 4TB SSD | 14.1.2 Sonoma
          Mac Studio 2023 M2 Ultra 128GB | OSX 14.1.2 Sonoma
          A range of deployable older Macs

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          • E
            Elton_John @mark
            last edited by

            @mark Hi Mark, the model is a sphere with a video texture on it.

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