SVG Filter - results pixellated?

I'm trying to create an SVG filter that works very well in Inkscape, but so far no luck in Ai.
The Inkscape filter is found in Filters > ABCs > Roughen, and basically uses feTurbulence and feDisplacementMap to create a very nice wiggly line that IMO is more realistic than Illustrator's "Roughen" filter.
Original path:
After Roughen:
In the Inkscape file, the filter looks like this (with the filter renamed to myRoughen):
<filter
    color-interpolation-filters="sRGB"
       id="myRoughen">
      <feTurbulence
         result="result91"
         baseFrequency="0.04"
         type="turbulence"
         seed="0"
         numOctaves="3"
         id="feTurbulence3810" />
      <feDisplacementMap
         in2="result91"
         scale="6.6"
         xChannelSelector="R"
         yChannelSelector="G"
         in="SourceGraphic"
         id="feDisplacementMap3812" />
    </filter>
Saving this file as plain SVG and importing into Illustrator, the path is there, but the filter comes out pixellated:
Zooming in on the pixellation:
Looking at how the filter got imported into Illustrator (ie, going into the Edit SVG Filter window), we see:
<filter id="myRoughen" color-interpolation-filters="sRGB">
        <feTurbulence result="result91" id="feTurbulence3810" type="turbulence" stitchTiles="noStitch" numOctaves="3" baseFrequency="0.04" seed="0">
        </feTurbulence>
        <feDisplacementMap scale="6.6" in="SourceGraphic" in2="result91" id="feDisplacementMap3812" xChannelSelector="R" yChannelSelector="G">
        </feDisplacementMap>
</filter>
which seems pretty much what it should be. So what could be causing the pixellation? As far as I can tell, there's no dpi setting associated with saving the plain SVG file from Inkscape, or with displaying the results of feTurbulence in Illustrator.
On a lark, I wondered if increasing the size of the line in Illustrator would help. Nope. All I get is a thicker pixellated line:
Any help?
Thanks
Tom

To my knowledge all SVG filters in Illustrator produce raster objects, therefore their appearance depends on the settings in the Effect > Document Raster Effect Settings dialog.
You could increase the the ppi setting there and turn on the Anti-aliasing option.
Probably not what you really want …

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Date: Wed, 21 Oct 2009 14:36:33 -0600
From: [email protected]
To: [email protected]
Subject: how to filter results from 4 dynamic list menus depandant on how many of them are selected
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