Mario Marquez calls himself an "Imagenero" or image worker. In his life he has worked with film and video (analog and digital), as producer, writer, director, editor, and post-producer in a broad range of narrative formats, from fiction to documentary. He has done work for TV, presented short and feature films in interational festivals, and created interactive works using live action video with narrtive structure.His latest project is called Mutable Cinema which is a Video Instrument for playing live narratives. Having work in many fields he feels unable to label his career under a single trade, other than the image trade.One thing can be found in Mario´s body of work, a well defined interest in nonlinearity and a open experimentation in production methods.The subject of time and perception are main features in his productionsand can always find an inovative approach in Mario's use of the technology, from playing with the chemistry on film processing to shooting using wireless video, and creating dynamic video databases with a GUI.