Grassie paints highly detailed and self-referential tempera on paper copies of photographs.
[1] Grassie's work of the late 1990s and early 2000s included tempera on paper studies of the gallery interior in which they were exhibited (1997),[2] and small copies of photographs of 1960s minimalist sculpture (2002).
[1] In 2005 he had a solo exhibition at Tate Britain, as part of the Art Now series.
He exhibited tiny paintings of an imaginary "rehang" of works from the gallery.
[5] His paintings have been praised for being "disorienting" and "melancholy",[5] and criticised for consisting of "bureaucratic ironies".