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I tried doing some pixel art, used the Rectangular Grid Tool, used Live Paint to create the art and then I expanded it from Object>Live Paint>Expand. I'm using 2 colors, black and red. My problem is that when I'm trying to resize this expanded art work as a group it ads one line of gray-white-red pixels.

pixel art
Click image for full resolution

Any ideas?

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marked as duplicate by JohnB Nov 14 '13 at 17:46

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Is this effect only present in Illustrator (and, possibly, Acrobat, if you save as a *.pdf), or does it persist in a print or a hi-res *.jpg? – Vincent Nov 14 '13 at 15:35

It's no longer "Live Paint" art if you've clicked the Expand button.

I'm not seeing any extra line specifically.

If you are referring to the thin grey line within the black areas, that is a result of on-screen anti-aliasing. Even vector art needs to use the pixels of your monitor to show you things. Those hairlines should disappear when printed or if exported/saved for Web with the "art optimized" anti-alias setting.

You may find it very helpful to turn off anti-aliasing in the prefs if you are creating pixel art.

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