Question: Maple V (1996) vs. Maple 11 (2007) .ps exporting

I am exporting 3d shapes generated by plot3d/surf3d to postscript, here is a comparison between my 11-year old copy of Maple from when I was a Freshman (left), and my current version(right): torus :( I've pretty much given up fiddling with the settings in Maple 11 to improve the quality; at this point, I'm wondering if anyone has any idea how to modify the .ps file itself to get rid of the thin diagonal lines that go through every quad in the (right) version. If it's simple enough, I could write a perl script to post-process my plots... Thanks. p.s. I'd use Maple V to generate the plots, but it doesn't have the functionality that exists in Maple 11 I need to generate all of them :/
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