Royer has had solo exhibitions in London, Denver and Brighton and has works hanging in both private and corporate collections worldwide, including Cine Aqua-Aquarium Paris.
He has exhibited work in the Royal Society of Oil Painters (2012) and the Royal Society of Marine Artists (2012-18) Annual Exhibitions at the Mall Galleries in London.
Royer was a finalist in the BBC Wildlife Exhibition in 2013 and exhibited in the David Shepherd Wildlife Art Exhibition in 2014 and 2015. He currently has his own studio near Brecon.