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------- Additional comments from [email protected] Tue Sep 29 13:12:19 +0000 
2009 -------
AW: Took a closer look at the 3D object. It's a rotation object constructed of a
PolyLine (break it open in draw) with 194 points, divided into multiple shapes,
none of them closed and all with a LineWidth of 0,5 cm and 85% transparency.
This indeed WILL expand to a VERY expensive 3D geometry; each fat line is
extended to 2D geometry and then rotated; all that painted in transparency mode
in 3D. I can not reproduce how that shape may have been constructed; as said,
the partial polygons are not closed, but look as if they should be.  The lines
have an unknown type of LineEnds, too (circles?), which seem to be defined as
beziers and also have a radius of 0.5. All that creates a massive 3D geometry
and there is no way to change that. The only way to get such a monster of 3D
geometry painted faster is a HW-accelerated 3D renderer. Even that renderer
would need the geometry construction, which will be a good part of the time 
used.
Also helpful will be to parallelize the 3D software renderer, but the best thing
would be not to define such geometries. Extremely complex geometries like this
one WILL get slow whatever system running on or whatever rendering hardware will
be used.
AW: Also checked with DEV300 m29 (last version without primitives): The 3.0 is
also pretty slow with this, but faster. I guess the difference is that 3D is now
AAed, too.

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