con gmic si può ottenere sta roba:
[img]http://img854.imageshack.us/img854/2981/zavv.th.png[/img]
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per il metodo cf.:
http://www.flickr.com/groups/gmic/discu ... 139589950/
con questo vecchio script
thttp://todogimp.com/download/extrusion.scm
(che ha un copyright )
questo:
[img]http://img819.imageshack.us/img819/1138/zavv2.th.png[/img]
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e stiracchiandole un po'
[img]http://img222.imageshack.us/img222/2341/zavv.th.gif[/img]
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