What would be the consequences if Japan Airlines altered their aircraft identity signage so that the tail had a second slightly offset green circle in addition to the current red circle? Against a blue daytime sky it would form a red, green, and blue additive color model, cleverly hearkening back to the initial attempts in the late 1800s to generate color photographs from three separate red, green, and blue filtered black & white images. On the other hand, it could trigger a different chain of events for an approaching aircraft where the pilot happened to be wearing 3-d glasses.