I like this idea. Giving it a go, I found generating the passwords time consuming - as in sometimes I would be okay to get a simple 2 image throwaway password without having to go throuugh all 6 images. However I suspect that my impatience was just curiosity in wanting to find out how it worked, and what I would see whan I finished :-)

I also didn't feel much attachment to the image - which could be addressed and has got me more interested about. Memory palaces. Genius loci - ancient way of remembering things using space, places. This works in a similar way, images exist on 2D space - the genius loci work best when the mental image is something you know well, that you remember well.

Thanks for sparking some ideas in my head!