Re: Unwanted lined in PDF-exported Graphics3D

*To*: mathgroup at smc.vnet.net*Subject*: [mg86776] Re: Unwanted lined in PDF-exported Graphics3D*From*: Mariano Suárez-Alvarez <mariano.suarezalvarez at gmail.com>*Date*: Thu, 20 Mar 2008 02:58:28 -0500 (EST)*References*: <fro362$i47$1@smc.vnet.net> <frqphe$4mn$1@smc.vnet.net>

On Mar 19, 7:22 am, Szabolcs Horv=E1t <szhor... at gmail.com> wrote: > Mariano Su=E1rez-Alvarez wrote: > > Simple code as > > > Export["test.pdf", > > Graphics3D[{ > > Polygon[Table[Chop[{Cos[t], Sin[t], 0}], {t, 0, 2 Pi, 0.1}]] > > }] > > ] > > > results in a PDF file which has lots of extra lines on the surface. > > > Is there a way to get rid of them? > > In this specific case I cannot see any lines with Adobe Reader 8.1.2. > However I think I know the problem that you are referring to. The lines > are an artifact of antialiasing, so there is not way to get rid of them > (apart from using a different PDF reader). > > For some reason Mathematica likes to break up large polygons into many > small ones and their edges become visible. > > See this thread: > > http://groups.google.com/group/comp.soft-sys.math.mathematica/browse_... I guessed it was antialiasing. It very much destroys the esthetics of these graphics I'm working on (sets of symmetry planes of polyhedra, each one drawn as a disc), sadly, for PDF output. I guess I was wondering if there is some way to tell Mathematica to work harder and not use that many polygons. Rasterizing in order to include in a PDF seems like a very wrong path... Oh well. -- m