Smillie has been recognized for her reinterpretation of protest banners through traditional craft materials.[5] Writer Johanna Fateman describes work like Smillie's Street Transvestites 1973 (2015) as "ornate, meticulously sewn and painted trans-liberation banners" that "could not get their radical point across more lovingly."[5]
In 2016 a series of watercolor paintings inspired by LeGuin’s novel were displayed at Haverford College. The exhibition was organized by the Haverford College Libraries in conjunction with the exhibition “Bring Your Own Body: transgender between aesthetics and archives," an exhibit curated by Jeanne Vaccaro and Stamatina Gregory at the 41 Cooper Gallery in New York.
In 2018, she had two solo exhibitions and one group exhibition: "Reflecting Light into The Unshadow," which ran from 1 July until 5 August at Participant Inc. located in New York, "To build another world," which ran from 7 September through 9 December at the Rose Art Museum, and “Face of the Future," which ran through 4 November at The Rubin Museum of Art. Taking the Le Guin novel The Left Hand of Darkness as inspiration, Smillie displayed an array of textile collages and banners as well as prints and works on paper including several watercolor paintings. In "Face of the Future," contemporary artists were challenged to create artwork taking inspiration from the classical sci-fi genre as well as their own imaginings of the future. Smillie’s work was presented alongside works by Maia Cruz Palileo, Tammy Nguyen, Sahana Ramakrishnan and Anuj Shrestha.[18]