In full sentences, please? And a little context?
In the 20th Century all sort of non-traditional and non-art materials were introduced into painting and sculpture. Picasso and Braque incorporated paper collage and mixed drawing (materials) with paint. In the 1960's Rauschenberg included 3-D elements like tires and stuffed animals as well as using found materials like crushed or flattened cardboard boxes. Dan Flavin used electric florescent lights and ballasts to create sculpture. Chamberlin used crushed auto parts for sculpture. Stella introduced honeycombed aluminum and glitter. [eJK]