TikZ/PGF optionsTikZ/PGF options are handled much as for PSTricks.
Though TikZ/PGF often allows colors and styles to be given
without corresponding keys, for example,
\draw[red,ultra thick](0,0)--(1,1);this is not permitted in
sketch. To draw a red, ultra-thick
line in sketch, the form is
line[draw=red,style=ultra thick](0,0)(1,1)
Just as for PSTricks, 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
pslines for the edge segments and the face options to
pspolygons. TikZ/PGF options known to sketch for
purposes of this splitting operation include arrows,
cap, color, dash pattern, dash phase,
double,
double distance, draw, draw opacity, fill,
fill opacity, join, line width, miter
limit, pattern, pattern color, and style.
The style option can contain both face and edge information, so
sketch must check the style value. Values known to
sketch include dashed, densely dashed,
densely dotted, dotted, double, loosely
dashed, loosely dotted, nearly opaque, nearly
transparent, semithick, semitransparent, solid,
thick, thin, transparent,
ultra nearly transparent, ultra thick, ultra thin,
very nearly transparent, very thick, and very thin.