OK - now I know its not Halifax, and its technically not even real (permanent) graffiti, but this system developed by some guys in Rotterdam, allows you to 'Tag' a building with a laser, and in real time have the pattern the laser drew, projected on the building. Its a vast improvement, and even a great response to the ads that are being projected on more and more buildings at night.
Even better, the equipment list and computer code needed is available. Check out the amazing video for the full effect. Now you too (for a mere few thousand dollars) can let the world know, in 5 storey high letters, EXACTLY what you think!
