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Intertwine Causes Hairline

Participant ,
Apr 12, 2023 Apr 12, 2023

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See image for hairline created when using intertwine. This is happening when rasterising from a 'High quality print' PDF. Doesn't happen when exporting to JPEG from Illustrator

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Draw and design , Tools

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Community Expert ,
Apr 12, 2023 Apr 12, 2023

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Which version are you using?

In which application are you using the PDF?

 

Intertwine is a live object. WHen you rasterize it right away, Illustrator doesn'Ät create clipping masks.

In a PDF it won't rasterize it, but try and keep the vector objects (which depends on the version). Therefore it needs clipping masks. And that is what you are seeing. Antialiasing artifacts because of masks.

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Participant ,
Apr 12, 2023 Apr 12, 2023

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27.4. Rasterised in Photoshop.

 

 

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Community Expert ,
Apr 12, 2023 Apr 12, 2023

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quote

27.4. Rasterised in Photoshop.

By @NMD UK

 

Can you please further explain that statement?

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Community Expert ,
Apr 12, 2023 Apr 12, 2023

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Then it looks more like a Photoshop rasterizing problem.

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Participant ,
Apr 20, 2023 Apr 20, 2023

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It happen's when saving to PDF too. No matter which PDF settings I use.

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Community Expert ,
Apr 20, 2023 Apr 20, 2023

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Did you try to turn off anti-aliasing in Acrobat? There is an option in Preferences > Page Display > Smooth line art.

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Participant ,
Apr 20, 2023 Apr 20, 2023

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That corrects it. for display purposes only. However, I need to send this Artwork in PDF format to the printers.

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Community Expert ,
Apr 21, 2023 Apr 21, 2023

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The file is likely fine. At the printer, it will being rendered at the full resolution of the imagesetter... there is no anti-aliasing being done at that point on the abutting objects.  The "gaps" show now ony because of the anti-aliasing. At lower resolutions; even at 300, the rasterizing is being done on an object by object basis, so fragments of the background shows through the semi-transparent anti-aliased edge pixels.

Here's a test: raster it in Photoshop at 1200ppi or even 2400ppi with anti-aliasing turned off.

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Participant ,
Apr 22, 2023 Apr 22, 2023

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Can confirm that 2400 test anti aliasing off worked. Can also confirm that as I had a drop shadow on the intertwined objects this was causing the intertwine issue.

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Adobe Employee ,
Apr 21, 2023 Apr 21, 2023

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Hi @NMD UK,

 

Sorry to hear about the trouble you are facing. Would you mind confirming if this is happening in all files or a specific one?

Also, would it be possible for you to share the file with us for further investigation?

 

Thanks,

Anshul

 

 

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Participant ,
Apr 22, 2023 Apr 22, 2023

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Appears to happen only when used in conjunction with a drop shadow on the intertwined objects. Here's the file. Also only happens when rasterising at lower sizes.

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Adobe Employee ,
Apr 27, 2023 Apr 27, 2023

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Thank you for updating us on the issue you were experiencing with intertwine causing a hairline when rasterizing from a 'High-quality print' PDF, @NMD UK.

 

We're glad to hear that the solution of using the 2400 test anti-aliasing and removing the drop shadow on the intertwined objects worked for you. Thank you for sharing this information with us.

 

To help us better understand the issue and investigate if it can be improved further, would you mind uploading the file to Creative Cloud or Google Drive and sharing the public download link with us, as Ai files cannot be attached directly in the Community? We will forward the file to our product team for further analysis.

 

Thank you for bringing this issue to our attention and for your cooperation in helping us resolve it. If you have any further questions or concerns, please don't hesitate to reach out to us. We are here to help.

 

Best,

Anshul Saini

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Participant ,
Apr 27, 2023 Apr 27, 2023

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Community Expert ,
Apr 27, 2023 Apr 27, 2023

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Flatten Transparency with keeping alpha transparency can also fix it. The dropshadow and gradient will be rasterized anyway.

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Adobe Employee ,
Apr 27, 2023 Apr 27, 2023

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Thanks for sharing the file, @NMD UK. I will forward it to the product team, and this will help improve the intertwine feature further. However, every effect is raster, so this is expected, but engineering will see if this can be further enhanced. Thank you once again!

 

Best,

Anshul Saini

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