angle, separation, phase
Set the cross-hatching style to be used with fill-area style 3.

PARAMETERS
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angle        -     The angle of the hatching lines wrt the horizontal.
                   The angle increases clockwise.
separation   -     The separation of the lines in units of 1 percent
                   of the smallest of the horizontal or vertical size
                   of the view surface.
phase        -     The phase of the lines, from 0 to 1.
