In Montreal, Canada, the city's walls are being transformed into works of art before the eyes of passers-by for the tenth edition of MURAL, an art festival dedicated to celebrating creativity and democratising urban art. The festival's director general, Pierre-Alain Benoît, says that over the past ten years, MURAL has become "increasingly recognised as a leader in urban art - street art - in North America." IMAGES AND SOUNDBITES