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Animate intersection line between Objects

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    Animate intersection line between Objects

    I am currently doing my first steps in UE4.
    I would like to create a toony water where intersecting objects are surrounded by a white animated foam.

    My Problem:
    I would like to replace the white constant gradient with a foam that changes in thickness randomly across the intersection to make it look more natural.

    Quick draw what i want to achieve:


    The intersection is calculated by a Lerp between White and Blue whereas the Alpha comes from depthFade:
    Click image for larger version

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    I tried to dynamically change the FadeDistance here by multiplying it with WorldPos / UVLayoutToWorldPos but that did not work well :/

    Maybe someone could give me a hint / link / idea who to change the thickness?
    Last edited by StreakyCat; 09-30-2014, 08:31 AM.

    #2
    updated initial post, changed title to clarify what iam looking for.

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      #3
      The easiest way to achieve that is to use a noise texture to modulate your depth. Simply add the texture to the alpha and play with the intensity of both to achieve the look you want.

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