As mentioned, the distinctions between painting and drawing are not always clear. In the main, however, painting involves the use of paint, but drawing does not. All sorts of surfaces can be used to create such art on – anything from formal stretched canvases to cardboard that has been retrieved from the bin is suitable. Graffiti art, which can be drawn or painted, means making public art on a pre-existing surface, commonly a wall. The key distinction is the material that is being used to make the marks themselves. When In drawing, you can use pencils, pens, crayons, charcoal, chalk, styluses and even software. With painting, however, paints – oils, acrylics and water-based pigments – are used. That said, many people consider the use of paints with other materials, such as sand or straw, to in no way detract from an artwork's status as a painting. Like all things in art, there is a lot of room for interpretation.