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  • Energy field

    Hi there,

    I´m doing some R&D with Max 2017 and Phoenix FDfor sort of an energy field around a body, something that you can usually see done with krakatoa.
    With the new body force I was starting to experiment, but I wanted to get some input:

    1. First setup was just an object set as emitter and also as body force object with a force of around 10000. Discharge smoke with a noise map modifier ("Enable Color mapping" in the noise map seems to be ignored unfortunately, so its hard to get thin lines of noise).

    Problems are mostly that the smoke still gets emitted too broadly, I´d like it to occure only on thin lines (see comment above) and that the look isn´t quite there yet (I was thinking of tweaking around for a cigarette smoke like opacity curve).
    I´m still having trouble how to manipulate the opacity curve to sort of cut off the start of the emission (where the smoke tends to either look too dense or have grid artefacts, haven´t tried going higher then 8 mill cells right now, to see if I could get rid of the artefacts).

    2. Second setup I tried was to emit drag particles.

    Problems here:
    1. The body force doesn´t seem to affect the drag particles. I tried adding "air" to the body force "Affect" space, but that didn´t help either.
    2. Is there a way to color the drag particles in the point shader mode?

    Any other ideas on how to achieve this effect?

  • #2
    Put your noise through an output map. The output maps color mapping worked on a test I did.
    Gavin Jeoffreys
    Freelance 3D Generalist

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    • #3
      Hello,

      The thin noise map seems to be working correctly in my tests.

      For the Drag particles - you can't affect their behavior directly but you can affect the velocity that is pushing them. We did some changes in the Nightly builds (if you get a one from tomorrow it should work) and if you type Velocity in the Body force "Affect" panel it should affect the drag particles as well.

      As for the color - we support only single color for now.

      I have attached a sample scene for the Noise. It emits drag particles (I have disabled them from Rendering from the Object properties of the Particle Shader)
      Attached Files
      Georgi Zhekov
      Phoenix Product Manager
      Chaos

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      • #4
        Ah, thanks for the input, I´ll give it a try.
        As for the color - any plans to implement that anywhere near in the future or is it being requested too rarely...?
        I mean its awsome enough that phoenix already replaces fume fx and real flow for me, but replaceing krakatoa aswell would be fine with me...

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        • #5
          Checked it out, thin noise indeed seems to work...not sure what went wrong in my test scene, my guess is that because I animated the noise map and due to the long particle lifespan the surface got covered quickly so it just seemed like the noise was spread out, when indeed it was just the particles.

          With a very low particle life span like 0.1 and enough velocity I think I can get the effect I´m after...

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          • #6
            We gotta add RGB to particles, it's in the TODO list, I just hope we can get there soon
            Svetlin Nikolov, Ex Phoenix team lead

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            • #7
              Click image for larger version

Name:	Energy_Field_Sphere_test_v001.jpg
Views:	1
Size:	24.5 KB
ID:	866939

              Jep, you should get there soon....first tests with my fake Krakatoa-Setup look promising...

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