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Both PSTricks
and TikZ/PGF
support polygon options that
have the effect of making the polygon appear transparent. For
PSTricks
, keywords opacity
and transpalpha
have
both been used, with the correct one depending on version.
TikZ/PGF
uses opacity
only.
When transparent polygons are in the foreground, objects behind them
(drawn earlier) are visible with color subdued and tinted. The hidden
surface algorithm of sketch
works well with such transparent
polygons.
Note that cull=false must be used for rear-facing polygons to be visible when positioned behind other transparent surfaces.
These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.