Okay, this whole Picasso thing is really ridiculous. Your analogy of adding a new shadow is something that would throw off the entire composition and balance of the piece. It's something that would be readily noticeable and change the entire context and overall effect of the picture plane. Changing five frames of light saber effects out of thousands more in a two hour movie is more akin to changing a single brushstroke, if it's comparable at all. Also, as much as I like Star Wars and think it's an important movie and piece of history, any comparison between a thirty year old motion picture with a plethora of original unaltered copies floating around in various formats and a one-of-a-kind piece of artwork from an established master is way off base.

In short: MeBeJedi and Zion aren't taking a palette knife to Guernica, they're making a light saber effect consistent between a span of a few dozen frames of film.

There is a great difference.