Despite his lack of formal artistic training, Kienholz began to employ his mechanical and carpentry skills in making collage paintings and reliefs assembled from materials salvaged from the alleys and sidewalks of the city. In 1958 he sold his share of the Ferus Gallery to buy a Los Angeles house and studio and to concentrate on his art, creating free-standing, large-scale environmental tableaux. He continued to participate in activities at the Ferus Gallery, mounting a show of his first assemblage works in 1959.