Sentence:  Only when the <WSD>collage</WSD> had been exhaustively translated into oil , and transformed by this translation , did Cubism become an affair of positive color and flat , interlocking silhouettes whose legibility and placement created allusions to , if not the illusion of , unmistakable three-dimensional identities . 
Meaning of the word marked with <WSD> tags:  a paste-up made by sticking together pieces of paper or photographs to form an artistic image