An additional comment related to enhanced3d:
Note that in the new version of draw, enhanced3d is no longer a global
graphics option.
Since it is now local, you have to introduce it before the definition of
the graphic object. This distinction didn't matter before.
I have to change some examples in
http://www.telefonica.net/web2/biomates/maxima/gpdraw/implic
accordingly to this fact.
Thanks
--
Mario