This is a Quartz Composer program that uses multitouch to create tentacle trails wherever one has placed their fingers.
There are two methods available for creation of trails, one being feedback based, the other based on image queueing.
The image queue version makes use of the kineme GL Tools inverse trackball rotation to allow the image stack to always "face" the camera. All of it uses the kineme multitouch patch.
The composition is available at the link above.
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