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Motion blur not present due to changing topology liquid

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  • Motion blur not present due to changing topology liquid

    I purchased Vray Next and testing it with Phoenix fd (new build). When I simulate fluid with velocity channel on and then I take vray camera with motion blur on, on render it starts to say Calculating embree motion blur, but log window says PhoenixLiquid001 has changing topology, can't motion blur mesh with deformations. It seems it was a Maya problem, not 3dsmax today?

    What is the procedure (exact) to produce liquid mesh moblur?

  • #2
    Also, turning on IPR in vray causes phoenix fd refresh frame-by-frame constantly, this can freeze 3dsmax and makes IPR unusable with animated Phoenix in the scene.

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    • #3
      Also, trying to save scene while IPR and Phoenix are on causes error: Unknown Class: SuperID=0x200. Framebuffer gets broken and vray restart is required.

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      • #4
        First problem partially solved after lone experiment - When Phoenix Particle texture is used on Liquid object, vray doesnt want to render it due to changing topology. But if there is standard texture used, then MB works, even if the topology is changing in the same liquid.

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        • #5
          Hey,

          Phoenix takes special care to construct its mesh with the same number of vertices when rendered with motion blur. However, I can't seem to be able to reproduce the issue with the Particle Texture applied on the liquid mesh. Do you still get these issues with a latest nightly? If you do, can you please send over a scene for this and the other issues?

          Cheers!
          Svetlin Nikolov, Ex Phoenix team lead

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