[jitter] Re: trails over a movie

Blend modes wouldn't work, I don't think, as they don't provide you with a place to leave trails...to leave trails over another object you'd need to store them somewhere...as you can't use the render buffer because of the video.

It'd probably best if you could use a shader on your sketch output. But i don't know how to go about that :).
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SmadSteck - http://www.smadsteck.nl
Hard- and software for interactive audiovisual sampling