This works wonderfully! With an image size 123456x123456, I made this happen: http://i.imgur.com/2Dgrazj.png http://i.imgur.com/2Dgrazj.png I killed it at abou

This works wonderfully! With an image size 123456x123456, I made this happen: http://i.imgur.com/2Dgrazj.png http://i.imgur.com/2Dgrazj.png I killed it at about 25GB memory usage, who knows how high it would have climbed otherwise.