·The three works in Figures 82-84 express how a plane is converted into a curved surface by partly changing parallel lines into curved lines. The effects of the change of direction and density of lines are thought to enhance the feeling of the curved surface.
 
 

82   83   84   Figure 82, 83: Composition giving a feeling of a curved surface by converting stright                              lines into curved lines. Figure 84: Feelings of bumps and dimples are expressed by converting stright lines into                       curved lines on a screen.

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