Sentence:  Only when the collage had been exhaustively translated into oil , and transformed by this translation , did Cubism become an affair of <WSD>positive</WSD> 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:  characterized by or displaying affirmation or acceptance or certainty etc.