The more you know a technique, the more you are free to express yourself through it. The constraints of the material, given by its nature, the available technologies and the processing steps, are actually opportunities for freedom. All these characteristics are taken into account when the artist imagines the final ideal shape of the artwork. The artist's expert knowledge of techniques, knowing in what time and in what ways to interact and intervene with materials helps the artisian bend and shape the final outcome of the artwork.