Any new film by experimental filmmaker and artist Michael Snow is a major event, and this 41-minute “road” movie of shifting landscapes shot from the bottom of a truck, and accompanied by the sounds of a film audience, is no exception. The title apparently stems from the common identity of Snow, who drove the truck, and the audience watching the film. Judging from a first viewing, Seated Figures lacks the pristine excitement of Snow’s monumental camera movement trilogy of the late 60s and early 70s (Wavelength, Back and Forth, and La region centrale), but it is full of different kinds of suspense and surprises for spectators who are prepared to experience a painterly film without a story line but with a great deal of luscious Canadian landscape, seen at close range and in motion. Snow himself will be present to answer questions, and he’ll also be showing his wonderful So Is This (1982), a remarkable film consisting of words flashed on a screen that manages to extend that minimal conceit into complex and entertaining strategies for addressing an audience. (Film Center, Art Institute, Columbus Drive at Jackson, Monday, April 17, 7:00, 443-3737)