A strong advocate and practitioner of plein aire painting he completes small oil sketches outdoors.  He uses these as raw material to create larger pieces in his Houston studio.  Part memory, part observation, part intuitive response to deeply felt experiences, his landscapes evoke in the viewer the feeling of having remembered something long forgotten, a place once visited.  There is a feeling of recognition, of the familiar and yet the elusive.

Parker describes his works as "perceptual realism."  He sees through and beyond the face of nature to an eternal reality and he records what he sees.