I have a logo symbol that has several intersecting lines. In Adobe Illustrator (CS6), slight gray lines are being added at the intersection points.

I haven't noticed it in other artwork, it only seems to appear on black (dark) backgrounds. There is no stroke.

Any idea what this is?

enter image description here

  • Is this a screenshot of Illustrator or an exported file?
    – JohnB
    Jan 8, 2013 at 0:10

1 Answer 1


To me it looks like you have "Divided" the shapes with pathfinder and you need to "Unite" them with pathfinder again (the top left icon in the pathfinder window). Ctrl-Click the shapes with the same colour (or go to select > same > fill & stroke) and click "Unite" in the pathfinder window.

(If you can't see the pathfinder window go to window > Pathfinder)

  • That was it! Thanks so much, would have never figured that out. Jan 8, 2013 at 3:31
  • You don't really need to re-unite the shapes except for your own reassurance: these lines are just artefacts in Illustrator's preview and will not show up in any export. They might show up in a *.pdf, but will not show when that *.pdf is printed.
    – Vincent
    Jan 8, 2013 at 14:04
  • Yeah I was thinking of adding that fact - I should have really haha. Jan 8, 2013 at 15:05

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