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"Raster bar" techniques?

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Erik Elizalde
"Raster bar" techniques?
on May 29, 2020 at 11:55:23 pm

I'm very new to After Effects. I've done several animations, a mix of character and abstract. I've had a lot of luck finding tutorials I need, but I'm having difficulty replicating this effect:

Could anyone help me out in replicating the background? What do you think is the best way to go about doing this?
Thank you.

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Chaz Chester
Re: "Raster bar" techniques?
on May 30, 2020 at 5:10:04 pm

I would create a rectangular shape with a gradient fill (looks like black, other color, black), then animate the start and end points of the gradient to mimic the example. Holding alt and clicking on the stopwatch will let you add an expression to the start and end points.
This expression: loopOut()
will make the animation repeat over and over again. The effect "Posterize" should help you achieve the banding/stepping that's in the example, if you're going for that retro look. Once you're happy with the animation, copy the layer as needed to fill the screen and offset each of the layers by a frame (or a few) to create the illusion of the color moving upward.

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