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##### 3.1.5.1 `PSTricks` options

When `language pstricks` is selected (the default), permissible key-value pairs include all those for similar `PSTricks` objects. For example, a polygon might have the options

      [linewidth=1pt,linecolor=blue,fillcolor=cyan]

`Sketch` merely passes these on to `PSTricks` without checking or modification. Option lists are always optional. A missing options list is equivalent to an empty one [].

When a `polygon` has options for both its face and its edges, and the polygon is split by the hidden surface algorithm, `sketch` must copy the edge options to `psline`s for the edge segments and the face options to `pspolygon`s. Options known to `sketch` for purposes of this splitting operation include `arrows`, `dash`, `dotsep`, `fillcolor`, `fillstyle`, `linecolor`, `linestyle`, `linewidth`, `opacity`, `showpoints`, `strokeopacity`, and `transpalpha`.