Remember biology class? Plants, like grass, need light in order to produce chlorophyll, which turns them green. The more light, the greener the grass becomes. The less light, the more yellow the grass becomes. Exploiting this botanical phenomena, British artists Dan Harvey and Heather Ackroyd of Ackroyd & Harvey created these large-scale grass portraits as part of an exhibition entitled ‘Face to Face‘ currently showing at the Domaine de Chamarande in France. By projecting negative images onto the grass, the duo was able to filter the sunlight such that multiple intensities of sun exposure could be achieved. The results are these stunningly realistic grass portraits.