# problem with exporting transparent object to pdf in version 9

Here is the code:

Export["~/Downloads/1234.pdf", Graphics3D[{Lighter[Black], Opacity[0.5],
Polygon@Table[{Cos[x], Sin[x], 0}, {x, 0, 2 \[Pi], 0.01}]}]]


in version 8, I get

in version 9, I get

why the color is different and also there are gridlines in the plot? Is there a way to fix the color and the gridlines in version 9?

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I think you'll find possible answers here mathematica.stackexchange.com/questions/17507/… and here mathematica.stackexchange.com/questions/3081/… –  bill s Jun 19 at 4:35