HatchFilling

HatchFilling[] is a two-dimensional graphics directive that specifies that faces of polygons and other filled graphics objects are to be drawn using closely spaced parallel lines. 

HatchFilling["name"] uses the specified line hatching "name".

HatchFilling[θ] draws parallel lines with an angle θ.

HatchFilling[θ,r] draws parallel lines with absolute thickness r. 

HatchFilling[θ,r,d] draws parallel lines with gaps of absolute thickness d. 

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