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  • streaming comet tail

    I'm trying to get a streaming comet tail. I've got as far as the attached image.
    I've disabled Vorticity and Gravity but there is still some kind of turbulence. Where does this come from?

    Does anybody have any ideas how I can get a more stream-like effect and avoid that turbulence?
    I'm going to try emitting from a noise texture to separate streams. Anything else I can try?

    The tail has to emerge and lengthen slowly, so I can't really add a force to stretch it out.
    Unless I also muck about with the time scale?

    Any ideas welcome.
    Thanks.


    Click image for larger version  Name:	2024-10-20 00_30_21-scene1_005.max - Autodesk 3ds Max 2020.jpg Views:	0 Size:	161.8 KB ID:	1218337
    Last edited by mark_aldred; 19-10-2024, 09:56 AM.

  • #2
    Hey Mark,

    There are few things you could do to make the trail smoother.

    You can change the Fluidity (Conservation) method to Direct Smooth and change the Transport (Advectiton) method to Forward Transfer for example. You can find more about these options here - https://docs.chaos.com/display/PHX4M...Smoke+Dynamics

    Another thing is to add a few more steps per frame - this will produce smoother trail, but will increase the simulation time.

    On top of that you can use the Smoothing options in the Input rollout - https://docs.chaos.com/display/PHX4M...annelSmoothing

    Cheers!
    Georgi Zhekov
    Phoenix Product Manager
    Chaos

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    • #3
      Thanks!
      I'll try all that out.

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