Imported transparent PNG and PSD files have random feint white lines around edges

[stubborncreative]

Since the latest Adobe Illustrator update, I am seeing random feint white lines around imported photoshop transparent PNG and PSD files, into Illustrator.

• The lines do not appear on the photoshop file, tested with various colour backgrounds.
• The PNG files are exported in high res, the Illustrator raster settings are at 500dpi (and tried 300dpi). The PNG export settings are "bicubic smoother" and I tested all other options (although historically, I always use the bicubic smoother setting with no issue).
• I've tried rasterising the images, and flattening to the background colour, lines remain.
• Upon exporting to PDF, or importing into InDesign, the lines are retained.
• Like the Adobe Acrobat line phenomenon, the keylines (in Illustrator) do change a little as you enlarge or reduce the scale on the screen.

This will be a digital online catalogue, as well as being printed, so I need these keylines gone. 

I suspect it is a bug.

Same candle, with navy background out of Photoshop - no white lines:

 

Thanks.

[kglad]

in the future, to find the best place to post your message, use the list here, https://community.adobe.com/

p.s. i don't think the adobe website, and forums in particular, are easy to navigate, so don't spend a lot of time searching that forum list. do your best and we'll move the post if it helps you get responses.

<moved from using the community>

[stubborncreative]

Thanks kglad. Was aiming at the tech team as I beleive it is a bug, but your support is appreciated.

[stubborncreative]

Here is another example...

[Ton Frederiks]

Is it stil visible when you switch from GPU to CPU Preview (CMD or Ctrl E)?

[stubborncreative]

Yes, no difference. Thanks.

[Ton Frederiks]

You may try installing a previous version to check if it is Illustrator or the images.

If that does not help, create the background in Photoshop.

[stubborncreative]

Thanks, do you know if there is a way to download an old version without over-riding/removing my current version and custom settings? 

[Ton Frederiks · Accepted solution]

You can have multiple versions installed.

https://helpx.adobe.com/download-install/using/install-previous-version.html

[stubborncreative]

Thanks very much Ton. Will try it over the weekend.

[stubborncreative]

Tested on an older iMac and older version of Illustrator, no issue.

Back on Mac Studio 2022 running Monterey 12.6.5...

fixed by turning OFF anti-aliased artwork (Preferences > General > Anti-Aliased Artwork) then switching to CPU view.

I will update to Ventura this weekend and see if that makes any difference - thoughts?