Brown also completed scratchboard illustrations for the book. The animation is done in a scratchboard or rough etching style. For "Trees" Landacre contributed more than 200 ink drawings on scratchboard. Eight of these books were illustrated by Clifford Geary in a distinctive white-on-black scratchboard style. Hare was a keen amateur artist who worked in oils, water colours and scratchboard. A selection of McKowen's works is featured in "A Fine Line&colon; Scratchboard Illustrations.". Scratchboard itself comes either with a paper (cardboard) backing, or a hardboard support. Scratchboard can be used to yield highly detailed, precise and evenly textured artwork.