Courchesne is known for his interactive video installations and environments. He began working in interactive video in 1984 when he co-authored Elastic Movies,[8] and since has produced many installation works and image series. In his early works such as Family Portrait and Portrait One (1989),[5][9] the viewer interacts with the a human image programmed to engage in a lifelike conversation with the viewer.[10][11] His later work Landscape One (1997)[5][12] surrounds the viewer with a 360 degree immersive and interactive video projection of a park.[13][14][15]
On September 11, 2001, while he was on assignment in New York City for a "Québec–New York" cultural event, Courchesne happened to be videotaping the smoldering North Tower of the World Trade Center as the second plane hit the South Tower. The 23-minute video of his experience was made available at CBC/Radio-Canada's archives.[16]
In 1994, he exhibited his work in a solo show at the Museum of Modern Art in New York titled Project 47: Luc Courchesne.[17] and has had numerous later solo and group shows, both nationally and internationally. In 2022, Luc Courchesne - Observateur du monde, an exhibition, was shown at the Carrefour des Arts, Université de Montréal.[18] He is represented by gallery Pierre-François Ouellette art contemporain in Montreal.
He has been awarded several artist-in-residence positions internationally.[19] Since 1996, he has been a member of the Society for Arts and Technology in Montreal. He was Chairman of the Board of Directors from 1996 to 2005, then Vice-Chairman from 2005 to 2008.