On the left, Serge et Gauguin jouant à la ficelle (1971) is an imposing triptych inspired by Indigenous string figure games; on the right, the intricate collage Entre la rivière (1967) hides innumerable shapes between the pieces of paper. The two smaller works (from 1969 and 1971) are untitled – common for Riopelle – pushing the viewer to apply the automatistes’ ideology and let go of preconceived ideas (Photo by Myriam Labbé)