 Sylvester <unk> the influence of late works by <unk> in other aspects , especially in the deep and rich colouring , <unk> 's portrayals of Philip IV , and agrees with identification of <unk> of Edgar <unk> as a source . He believes <unk> borrowed from <unk> the use of parallel heavy folds to create the illusion of what <unk> described as " <unk> " , as seen in the earlier artist 's After the Bath , Woman drying herself . Sylvester makes a further direct link between the folds and the transparent veil in <unk> 's Portrait of Cardinal Filippo <unk> . He believes the folds serve to " push the viewer back " , creating a distance from the subject , an effect he sees as similar to the separation between and orchestra and setting ; others view the folds as more closely resembling the bars of a prison . Sylvester describes them as an <unk> of background <unk> into stripes that are made to appear as if they pass through the sitter . In his " <unk> with Francis <unk> " series of books , he asked <unk> why he found the effect so poignant . The artist replied , " Well , it means that the sensation doesn 't come straight out at you but <unk> slowly and gently through the gaps . " 
