Problem with noise/artefacts in AE6 Ray Traced mode.

i'm having problem kind or weird artefacts appearing on parts of imported illustrator layer. here's import procedure i'm using:

 

in ae6 switch ray traced 3d mode, make new comp, add camera, import illustrator file, drag comp. right-click on illustrator file in comp , and select "create shapes vector layer" make layer 3d. can extrude etc. sake of post, didn't that. artefact regardless.

 

here's cropped portion of illustrator file showing problem:

 

http://img99.imageshack.us/img99/74/linesc.jpg

 

 

here's screen-cap showing problem different angle:

 

http://img717.imageshack.us/img717/4757/lines2.jpg

 

 

the sample image in full res , set ae's "final quality" mode.

 

i've tried different setting render quality (the same image set 10), seem higher quality set to, more obvious artefacts become!

 

i've added no lighting or else scene, jut camera , ai file. i've inspected illustrator file inside illustrator , cannot see @ can causing problem. perhaps export setting problem in ai?

 

these lines appear when use "create shapes vector layer" option.

what video card?  looks possible corruption of gpu render.

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