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Droplets look unreal

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  • Droplets look unreal

    Hello,
    I just rendered a simlulation and the droplets look so unreal. I did an alembic cache for the simulation and added extra splashed with the simulation. The added splashes are the white ones (I couldn't figure out how to change the texture to the one I have on the mesh). The droplets just look very round, too round.(see attached video) And when they fall back into the water, they don't merge. They just disappear. I probably missed some steps when I did this sim, but I honestly couldn't find anything in the manuals or any tutorials. If you can help me or suggest any tutorials, I would really appreciate it.
    Overall the aim of this simulation is too make it as realistic as possible (here is the original footage I'm trying to get as close as possible https://www.dropbox.com/s/uys9vn9s2l...ginal.mp4?dl=0 )
    Dropbox is a free service that lets you bring your photos, docs, and videos anywhere and share them easily. Never email yourself a file again!

  • #2
    Hey,

    The splash and mist particles are separate from the liquid simulation, in order to optimize memory and CPU usage.
    While normal liquid simulation can produce splash, and if you increase the resolution to incredible values it will produce mist as well, such a simulation would run slowly and consume an incredible amount of resources.

    Besides saving on resources and rendering time, there is another strong advantage to controlling splash and mist separately from the liquid itself: different shaders can be used for splash/mist and the liquid.

    You can find more about the splash particles along with some examples here - https://docs.chaosgroup.com/display/...plash+%7C+Mist
    And here you can find more on how splashes are born and dying - https://docs.chaosgroup.com/display/...les+Life+Cycle

    In your case - the splashes size depends on the grid resolution and the splashes shading is controlled by the Particle Shader instead of the material applied to your liquid.

    My recommendation in order to get the result in the reference video is to skip the splashes and use only the liquid particles. You will just need to increase the grid resolution.
    In order to get the small droplets that are created by the splashing liquid you could use some surface tension and use some Droplet Breakup - you can find more about it here - https://docs.chaosgroup.com/display/...SurfaceTension

    Cheers!
    Georgi Zhekov
    Phoenix Product Manager
    Chaos

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    • #3
      Try to tweak the options "Splash Amount", "Liquid-Like" and "Affect Liquid" , the goalis to have more splash particles with lower size, that stick to each other and form tentacles, instead of flying alone and being observable as spheres.
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