Some Paintings are works of art that can be created in a variety of mediums. Scapes are landscape paintings, usually depicting natural scenery such as mountains, valleys, and rivers. Portraits are representations of people, often focusing on their facial features. Oils are a type of paint made from pigments suspended in a drying oil, such as linseed or walnut oil. Op Art is a style of abstract art that uses optical illusions to create a visually stimulating effect.