Robert's paintings and prints are in collections all over the U.S. and Europe. A collection of his drawings & etchings, Speaking Fire at Stones, was published in 1993. He is well known for his series of 70 painted etchings based on William Blake's “Proverbs of Hell” and for another series of 50 painted etchings reflecting on the metaphor of the Annunciation.

His painting has tended toward the narrative and the surreal; however, for twenty years he has been painting the series of portraits Americans Who Tell the Truth. The exhibit has been traveling around the country since 2003.