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  1. 31st March 2009, 11:02 #1
    BioticPictures
    BioticPictures is offline Member
    Join Date
    Mar 2009
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    3

    Default Shake Time Expressions

    I have two images that I rendered out of a 3D app. I want to take five different grayscale designs and use them as alpha mattes to basically occlude certain parts of the two 3D renders.


    My goal is to be able to come up with an expression that randomly flashes these 5 alphas, but with values of either 1 or 0... no half transparent mattes.

    Im not sure if this makes sense to anyone but me ...

    any ideas?
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  2. 1st April 2009, 01:58 #2
    Jacques Levesque
    Jacques Levesque is offline Member
    Join Date
    Apr 2009
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    2

    Default

    Connect your 5 grayscale designs to a select node with one of those 2 expressions as the branch value:

    1+(noise(time)*5)
    1+(rnd(time)*5)

    Then use the output of the select to occlude (multiply?) your images
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