The other night I watched a very nice lecture from Paul Prudence (dataisnature.com). He uses VVVV to make audio-responsive video feedback, where a single shape (a square) is recursively displayed, causing very complex structures to arise. The relevant parts of the lecture are here:
http://www.vimeo.com/2930699 http://www.vimeo.com/3003040
although I would encourage people to go through the whole thing (11 parts on Vimeo) if they have time + interest.
I'd at a loss to think of how something similar, i.e. the recursive feedback, could be done in GEM or PDP. Any suggestions?
best! Derek