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Why does the LC dosn't converge in the LC pass? -> Vlado

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  • Why does the LC dosn't converge in the LC pass? -> Vlado

    Hallo Vlado,

    if I use the LC mode, than I see in the first seconds the image will be better and better. But after approx. 500 ... 1000 subdivs the progress stagnate, the noise stay at a low level.

    Simple test: take a interior scene, set LC as primary engine and use no sec engine. Use 5000 subdivs with a size of 0.001 and look at the rendering. It dosn't converge to a solution with less noise like in PPT mode.

    OK, I have seen now that different subdivs count change the the noise level in the full rendered image with all passes. If the image is rendered with all passes, a rendering with more samples looks better than with less samples. But I would like to see the converge image during the LC pass, so I could decide in this pass, did I use enough subdivs or not.

    A workflow idea is, to create a LC upto a good noise level and than to rerender the image based on a smoothed LC. Something like a PPT mode with reuse of the LC cache file for smoothing the noise. It could be good, to set a LC mode to a high subdiv count, start the rendering and if the noise looks good to break the pass. Than Vray should save the LC solution and the user could start a finish pass based on the LC. Good would be, if Vray would allow to stop the LC pass and would render the last pass per automatic. At the moment, if I stop the LC pass, no LC Cache file is saved.

    EDIT: I have seen now, the LC is saved in every case, it is not shown in the progress window only. But how could I reuse it with a smooth look? I'm confused.

    -Micha
    www.simulacrum.de - visualization for designer and architects

  • #2
    Why does the LC dosn't converge in the LC pass? -> Vlado

    as far as i remember this was indeed possible with vray for max. you could setup a lightcache calculation and after stopping it it was used for the final rendering. i cannot remember if this was in ppt mode, but there was some option that you could stop lightcache calculation and it was automatically used for further calculations.

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    • #3
      Why does the LC dosn't converge in the LC pass? -> Vlado

      Originally posted by oluv
      as far as i remember this was indeed possible with vray for max. you could setup a lightcache calculation and after stopping it it was used for the final rendering. i cannot remember if this was in ppt mode, but there was some option that you could stop lightcache calculation and it was automatically used for further calculations.
      Cool. One of the same for me please.
      www.simulacrum.de - visualization for designer and architects

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      • #4
        Why does the LC dosn't converge in the LC pass? -> Vlado

        In fact, there isn't such an option in 3dsmax. The way to do this would be to cancel the rendering, save the light cache, and then use the saved one in subsequent renderings.

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

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        • #5
          Why does the LC dosn't converge in the LC pass? -> Vlado

          Vlado, could it be possible to show the LC calc. phases like the PPT phases, as a continuous refinement of the noise. So I could get in this early pass a feedback of my scene and the calculation.
          www.simulacrum.de - visualization for designer and architects

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          • #6
            Why does the LC dosn't converge in the LC pass? -> Vlado

            Originally posted by Micha
            Vlado, could it be possible to show the LC calc. phases like the PPT phases, as a continuous refinement of the noise. So I could get in this early pass a feedback of my scene and the calculation.
            It can be done, of course, but it would require additional memory, like PPT, which is probably not justified for only preview purposes.

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

            Comment


            • #7
              Why does the LC dosn't converge in the LC pass? -> Vlado

              Originally posted by vlado
              Originally posted by Micha
              Vlado, could it be possible to show the LC calc. phases like the PPT phases, as a continuous refinement of the noise. So I could get in this early pass a feedback of my scene and the calculation.
              It can be done, of course, but it would require additional memory, like PPT, which is probably not justified for only preview purposes.

              Best regards,
              Vlado
              Hmm, a small option flag could be a good deal.
              For example, at the moment since 15 min a LC pass is calculated, but I can not say, how good the quality is. If my memory would allow it, I would use the continous view method. So I could see, should I use more subdivs or less (!) for my next rendering.
              www.simulacrum.de - visualization for designer and architects

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