I've encountered a very common problem with thin white lines appearing in some of my vector imagery in Illustrator CS5.5. Like with most stitching errors, I get this when using shapes with gradient transparency. There's also some shape distortion happening depending on the level of zoom I'm on.
I understand that this may go away when printed but I actually intend to e-mail a portfolio PDF that contains these vectors which is meant to be viewed on screen. I have tried turning the transparency of the objects to 99% but the problem would not go away. I've tried disabling anti-aliasing which removes the white lines but makes the vector jagged and not smoothed. The shapes that I'm using comes from text that's been broken apart with gradient transparency added to some parts.
To get a better understanding of what I'm seeing, this is what it looks like. The top is what the image looks like in actual size and the bottom are zoomed up to further show how it looks like.
Yes, I want to produce a design portfolio to show prospective employers or clients.
I tried using it as a PNG but since I'm using this as a logo in a multi-page PDF, the PNG pixelates as the PDF is resized in Acrobat which is most likely the case if someone else opens it up in their computer. That's why I prefer to keep it as a vector.
It appreas very simple - you just need a slight bit of overlap between your 'stitched' shapes.
You only need to drag one point over it's stitched neighbor with the Direct Selection tool. I do this sometimes, to guarantee no hairlines where paths share the same edges.
When you save your .ai file as a PDF, choose Acrobat 6 compatibility or higher and select create Acrobat layers. Avoid using .eps, if possible. Also, your PDF might display better if you can keep the type live (not outlined).
Instead of saving it as an eps, I saved it a PDF using the settings you suggested and the lines went away. I guess I never thought about saving vector images as PDFs to be imported inside other PDFs. Thanks!
Europe, Middle East and Africa