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Copying old frames into the actual one... "onion" effect from Flash

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Johannes Roth
Copying old frames into the actual one... "onion" effect from Flash
on Aug 1, 2010 at 7:17:06 pm

Hey guys,

lets try to explain this with an example: I create three PNGs, each showing a different letter (a.png, b.png, c.png). So these show "a", then "b" and then "c" when imported as an image sequence.

What I need is an effect that "blends" every old frame into the new frames. So at first I see an "a", then the blended combination of "a+b" and then "a+b+c" instead of "a", "b", "c". Fancy settings like overlay, multiply and screen would be cool, but aren't necessary.

--> I want to copy each shown frame into the new ones.
It's a bit like this "onion" stuff in flash without fading old frames out after a time:
http://animation.about.com/od/flashanimationtutorials/qt/flashonionskin.htm

Other example: I import a rendered jumping ball. With the effect settings that I need, it looks like the ball is drawing on the screen.

Hope you understand what I am trying to explain.

With kind regards
Johannes


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Steve Roberts
Re: Copying old frames into the actual one... "onion" effect from Flash
on Aug 1, 2010 at 11:15:45 pm

Effect>time>echo might do.

Echo needs to work with moving stuff. Apply it to:
- a movie, or
- a comp, or
- an adjustment layer over animated still layers



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Johannes Roth
Re: Copying old frames into the actual one... "onion" effect from Flash
on Aug 2, 2010 at 8:47:07 pm

Thanks, thats exactly what I needed.

Stupid After Effects CS3... I searched inside the effect folder called "Time", but there also is a folder called "Zeit" (the German word for time, since I bought the German edition). Puh.

Well, thanks a lot!


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