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Thread: Volumetric Lights Alpha?

  1. #1

    Angry Volumetric Lights Alpha?

    OK I need to have my volume lights to have a value in the alpha channel for compositing, they don't show up at all! Is there anyway to capture the volume light infor for the alpha channel?
    Thanks
    Robert

  2. #2
    UltramegaOK Triple G's Avatar
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    Not that I'm aware of, but why not just render them over a black background and then comp it in screen mode?
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  3. #3
    Alpha for volumetric lights comes from their opacity.

  4. #4
    UltramegaOK Triple G's Avatar
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    Well....guess that shows you how often I use volumetric lights...
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  5. #5

    Unhappy No shadows in Volume Alpha

    Increasing the opacity made the light volumetrics visable in the alpha but the shadows do not show up. Without the shadows this does not work for me I am doing flying logos and such so the the object shadows in the volume lights alpha is vital important. I need to be able to composite in After Effects, etc.. There has to be a way. Also the Volume light opacity does not produce the falloff but rather just an even blanket where ever the light is. I am going to have to use Electric Image, XSI, Maya, Cinema 4D or 3d Studio Max since Lightwave can't produce Volumetric Light/Shadow information in the Alplha channel, all the other apps do so. Somebody write a patch, please.

  6. #6

    Unhappy No shadows in Volume Alpha

    Increasing the opacity made the light volumetrics visable in the alpha but the shadows do not show up. Without the shadows this does not work for me I am doing flying logos and such so the the object shadows in the volume lights alpha is vital important. I need to be able to composite in After Effects, etc.. There has to be a way. Also the Volume light opacity does not produce the falloff but rather just an even blanket where ever the light is. I am going to have to use Electric Image, XSI, Maya, Cinema 4D or 3d Studio Max since Lightwave can't produce Volumetric Light/Shadow information in the Alplha channel, all the other apps do so. Somebody write a patch, please.

  7. #7
    I got this link from fellow forum member mrgrusin. It works perfect! I ran some tests and it looks fantastic! Hurray I don't have to use another app, I love light wave!


    To get Lightwave to generate an alpha channel which includes volumetric lights, glows, etc., try this plugin: http://www.ats-3d.com/post_Alpha/index.htm. Works great, and it's even free.



    RobertRhino

  8. #8
    UltramegaOK Triple G's Avatar
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    Good to know! Thanks for that link. (Which is broken, btw...the period at the end of "htm" got included in the url).
    Gregg Domain
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    Get Into Adobe After Effects

  9. #9
    Oops!

    http://www.ats-3d.com/post_Alpha/index.htm

    This is a free plugin.
    Thanks
    RobertRhino

  10. #10
    You can use the Image Filter "Flare2Alpha" in LW[8].
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