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I'm working on a logo in Illustrator CC, and have a single letter (text) with 5 strokes, but for some reason there are random black artifacts/lines that appear in the stroke. I hoped it was just a preview issue, as the artifacts jump around as I zoom in and out. I exported a jpeg and the artifacts are in the exported image. Does anyone have a clue as to why this is happening?

enter image description here

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    Have you tried to turn opengl acceleration off. – joojaa Jul 25 '17 at 18:32
  • Actually, since you said that, I noticed GPU acceleration wasn't available. I entered BIOS and enabled Nvidia (Thinkpad), then the GPU acceleration option was available in Illustrator settings. I checked the box to enable it, and it FIXED the problem. The lines are gone! Hours of headache for 1 little checkbox. Thank you! – William Jul 25 '17 at 21:17
  • If you solved your problem by yourself or with the suggestion from a comment, please consider answering your own question and ticking that answer as the accepted one. That will tell other visitors with the same issues that this was the right solution. Thanks! – Vincent Aug 24 '17 at 11:46
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When you say "text" you mean real text ? Or vectorize text ?

Anyway in some cases, font aren't perfect so you need to tweak them a bit. I think there's small gap in this font so I suggest you to save your style in the style panel, vectorize your letter, make sure everything is overlapping (where there was a wild stroke) and then une the pathfinder ton make one big ol' shape !

Them re- apply your style and you're done !

  • When I say text I mean actual text. When I change fonts I have the same problem. When I go to Type/Create outline, then Object/Expand Appearances then Object/Path/Outline Stroke, then Object/Expand, it goes away, but I'm sure that's not the most efficient way. Also once converted to an outline, I'm unable to edit my text later if I want to change the font or something. Thank you, I'm open to suggestions/tips. – William Jul 25 '17 at 11:02
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It's a typical GPU acceleration issue. Turn it off/on. If GPU acceleration was on and you had this issue, check for GPU driver updates. In some cases BIOS update also solves the problem.

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