As the movement progressed, many other artists became associated with the artistic style of Psychedelic Art. Some of these artists included Peter Max, Mati Klarwein, Pablo Amaringo, Roger Dean, and Robert Williams. Even the artist Salvador Dali became associated with the Psychedelic Art style. Psychedelic Art usually featured other elements, as well, that became major components of the style. Spirals could often be found in Psychedelic works as well as concentric circles and a repetition of motifs or symbols. Collage is important to the Psychedelic style and many works could also be included in the collage genre. Surrealist subject matter was another major component of the style. Certain exotic motifs like paisley were also at the heart of many Psychedelic works.