RICHARD MORTENSEN.
Rubello's teacher at the Royal Danish Academy of Fine Arts from 1963-66 was a Danish painter (1910-1993) known for geometric abstraction. His mantra, according to Rubello, was "Line, form, color."
Suite Ribe IV, Lakolk by Richard Mortensen, 1973. Oil on canvas. Courtesy Danish National Gallery of Art.
While in school, Rubello and two fellow students appeared on a Danish TV program, co-creating a messy, black-and-white action painting . The next day, Rubello remembers that Mortensen, an "expansive, emotional guy," was irate. "That just wasn't the way he wanted us to paint."
See COLOR and IRRATIONAL GEOMETRY