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Thread: Express yourself!

  1. #1
    Guinea pig in charge stealthoperator's Avatar
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    Express yourself!

    Hya!

    I have set up a normal displacement for my model. And I want the displacement to be animated so that it looks like it is made of clay or so.

    So I created an expression that randomly rotates my displacement texture (some procedural noise) using the random(x,y) command.

    So far so good. But actually, I don't want the displacement to move every frame. How do I do that?

    I tried to set my expression to something like

    random(0,1)*random(0.0,30.0)

    which should give me about half the times a value of zero. But it doesn't.

    Does anyone know what I could do to make it work?

    Thank you veryvery much!

  2. #2
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    Not sure why you would want to use random displacement via an expression when a simple envelope on the rotation channel of the procedural, or even morph maps would be much easier to control.

  3. #3
    Kamehameha Chameleon BigHache's Avatar
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    Sounds like he's going for a similar technique that Aardman used in "Curse of the Wererabbit".

    I read an article about it in a magazine, you might be able to find it online. I don't believe they used a random generator rather than just a few frames for the displacement map. What you could try is working with maybe five or so frames and duplicating them so that the animated texture only changes every 2-3 frames. So frames 1-2 are the same, 3-4, etc...

  4. #4
    Guinea pig in charge stealthoperator's Avatar
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    Yeah, that's kind of the effect I want to achieve.

    So you suggest just to hand-animate a few frames of the displacement and then repeat the motion?

  5. #5
    Super Member SplineGod's Avatar
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    I would try using the textured channel motion modifier in the graph editor.
    Use a procedural and turn the contrast up pretty high. This will randomly move the channel and keep it on/off for a random length of time due to the contrast setting.

  6. #6
    Guinea pig in charge stealthoperator's Avatar
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    Very cool!

    I did some tests and it looks the way I imagined.
    Thank you!

  7. #7
    Super Member SplineGod's Avatar
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    Good! Post some of your results when you can

  8. #8
    Guinea pig in charge stealthoperator's Avatar
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    I will!

    Right after my hollidays!
    Happy new year!

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