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Thread: Planetary Atmoshere's in Lightwave 2019

  1. #1
    May the sauce be with you starbase1's Avatar
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    Planetary Atmoshere's in Lightwave 2019

    Hi All,
    I was never very happy with my attempts at adding an atmosphere to a planet, (I'm talking whole planet views).

    I had something that sort of worked by adding a slightly larger sphere with a gradient controlling transparency by incidence, but it was all a bit basic, and hard to edit.

    So, is there a better way of doing things now that I have jumped from 11.6 to 2019? A proper thin volumetric effect perhaps?

    Thank you!
    Nick
    Faith is the opposite of Intelligence.

    Touched by his noodley appendage!
    My Lightwave Graphics & Downloads!!!

  2. #2
    RETROGRADER prometheus's Avatar
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    Quote Originally Posted by starbase1 View Post
    Hi All,
    I was never very happy with my attempts at adding an atmosphere to a planet, (I'm talking whole planet views).

    I had something that sort of worked by adding a slightly larger sphere with a gradient controlling transparency by incidence, but it was all a bit basic, and hard to edit.

    So, is there a better way of doing things now that I have jumped from 11.6 to 2019? A proper thin volumetric effect perhaps?

    Thank you!
    Nick
    Same principles with new surfacing, but you could also use the new volumetrics, or the old, longer to render..and though acting more realistic to lighting and shadows..it may be diffucult to get thin enough.


  3. #3
    Goes bump in the night RebelHill's Avatar
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    Yep, there was a whole thing here too...

    https://forums.newtek.com/showthread...sphere-problem
    LSR Surface and Rendering Tuts.
    RHiggit Rigging and Animation Tools
    RHA Animation Tutorials
    RHR Rigging Tutorials
    RHN Nodal Tutorials
    YT Vids Tuts for all

  4. #4
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    I posted a couple of sample scenes in the thread referenced by RebelHill, including one using the new volumetrics:

    https://forums.newtek.com/showthread...=1#post1564874

    mTp

  5. #5
    May the sauce be with you starbase1's Avatar
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    Thanks all, I will follow up on those links.

    I could never get the old volumetrics thin enough, and I'm hoping for a proper volumetric solution this time. I'm thinking particularly of cases like Mars, where the largest features stick clear through the atmosphere.
    Faith is the opposite of Intelligence.

    Touched by his noodley appendage!
    My Lightwave Graphics & Downloads!!!

  6. #6
    RETROGRADER prometheus's Avatar
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    Quote Originally Posted by starbase1 View Post
    Thanks all, I will follow up on those links.

    I could never get the old volumetrics thin enough, and I'm hoping for a proper volumetric solution this time. I'm thinking particularly of cases like Mars, where the largest features stick clear through the atmosphere.
    Still tricky I think, and itīs not about getting it thin enough, but thin and yet showcasing depth and shadow in the clouds.
    In the real world clouds are at various height, and within each cloud layer the clouds are peaking in different altitudes, trying to acheive that with volumetric and texture applitude is very difficult,
    you could probably fake it a bit by feeding a different or the same procedural texture in to various channels, but it has to be sligthly different to give variations to the cloud.
    In Lightwave..tricky and takes a lot of time, In terragen..great results without that much to worry about.

  7. #7
    RETROGRADER prometheus's Avatar
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    By the way...there is a Lightwave scene with cloud layers set up (volumetric)
    earth hi-res




    Click image for larger version. 

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  8. #8
    RETROGRADER prometheus's Avatar
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    By the way...there is a Lightwave scene with cloud layers set up (volumetric)
    earth hi-res
    And you can change cloud types to whatever your liking from all the wonderful procedurals, flow noise, gardner clouds, weather and many many more, those are part of dpon rman collection though.
    alien planet clouds with much thicker swirling stuff can be done nicely too.



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  9. #9
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    Here's a Mars-type variation on the Volumetric sphere I posted in the previously referenced thread, with the surface features of the planet (mountains, not clouds) extending up into the volumetric atmosphere and showing shadows (Distant Light):

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    MOV file: Mars_VolumetricAtmosphere_CloseupCamera.mov

    The Light was moved during the animation so the shadows of the surface features in the atmosphere change direction, but that's just for demonstration purposes.

    The Volumetric setup uses a Scalar layer to provide a 0.0 to 1.0 thin layer toward the circumference of the sphere, in this case 5.3km. The Gradient node then "shapes" the layering of the atmosphere, with a low bounds on the Gradient of 0.7:

    Click image for larger version. 

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    To get surface features of the planet to extend into the atmosphere, I used a 3D Rigid Multi-fractal texture in the Nodal Displacement graph with a large scale (1km), a lot of octaves to provide detail, and then scaled up the Bump map by 400% to exaggerate the features:

    Click image for larger version. 

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    Of course, instead of a Procedural, you could use real Mars elevation data as a spherically-mapped 2D Image. To get the render engine to provide a high degree of surface detail, the Render subpatch level on the Mars sphere is set very high (300):

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    with the display sublevels at only 10 to get good Layout performance outside of rendering.

    Here are a couple of animations with a less-exaggerated surface with different camera views:


    When the high-relief versions of these finish rendering, I'll post the results.

    Have fun!
    mTp

    P.S. The posted scene file has its Start Frame for rendering set to 95, so if you want to render the scene yourself, you'll need to set the Start Frame back to 1 in CTRL-P render properties General tab.
    Attached Files Attached Files
    Last edited by MonroePoteet; 06-21-2019 at 08:51 AM. Reason: P.S. Start Frame in posted scene is at 95

  10. #10
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    Here are the MediumCamera and DistantCamera renderings:

    MediumCamera: Click image for larger version. 

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    DistantCamera: Click image for larger version. 

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    mTp
    Last edited by MonroePoteet; 06-21-2019 at 01:46 PM.

  11. #11
    RETROGRADER prometheus's Avatar
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    Quote Originally Posted by MonroePoteet View Post
    Here are the MediumCamera and DistantCamera renderings:

    MediumCamera: Click image for larger version. 

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    DistantCamera: Click image for larger version. 

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ID:	145287 Mars_VolumetricAtmosphere_DistantCamera_HighRelief.mov

    mTp
    Will have to look at your scenefiles tomorrow, itīs 20 minutes past midnight here at midsommers eve, wonderful evening with barbeque and strawberries..a long walk home through the villages ..wonderful night smelling all the summer flowers and listening to all the late night folks singing and laughing..I didnīt hear the "små grodorna..små grodorna" but I did hear the sound of silence with simon and garfunkel, and that is just fine and dandy
    But itīs bedtime quite soon for me know, not the same stamina as in my youth days, (except when I get all excited doing some 3d stuff)
    Thanks for sharing MonroePoteet.

  12. #12
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    Glad to help if I can!

    ...and, of course, it wouldn't be complete without the obligatory terminator transit sequence:

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    MOV File: Mars_VolumetricAtmosphere_TerminatorTransit.mov

    mTp
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