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Placed PNG with transarency causes entire spread to look low quality?

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    • #87366
      Lala Lala
      Participant

      Before anyone says “object level display preferences” or anything like that… everything is set to High Quality Display, both in preferences and for the individual graphics, that isn’t the issue.

      This seems to be a bug with how Indesign handles graphics that involve a PNG with transparency.

      If I place a png with transparency, my entire layout suddenly turns jagged and nasty, like I was using the lowest quality display setting. If I relink to, say, a JPG… or a PDF… or a PNG that has no transparency… the graphics are immediately ok again.

      Is there a fix for this or just something I gotta live with?

      Screenshot of vector PDF graphic (left, next to the 88) and PNG graphic (right): https://i.imgur.com/CPPNkWd.jpg

    • #87382
      David Blatner
      Keymaster

      I cannot replicate this problem. If you’re using a new version of InDesign CC, then perhaps try turning off GPU rendering:
      https://creativepro.com/gpu-support-and-animated-zoom-arrives-for-mac.php

      But, more to the point, I do not think PNG with transparency is a good file format to use with InDesign. I strongly suggest saving as PSD from Photoshop.
      https://creativepro.com/tiff-vs-psd-vs-eps-vs-pdf-vs.php

    • #87531
      Lala Lala
      Participant

      Hey, I just realized my reply apparently didn’t go through.

      Thanks for your suggestions. I am actually on ID CS6 so maybe I actually need GPU rendering.

      The result is the same for any raster image format that supports transparency, I get the issue with PSD,
      PNG, or tiff. So no joy there.

      I think it’s a resources issue because for a second after I open the file, the png graphics
      display as extremely pixelated, then resolve to a higher level of detail (though still far from perfect).
      You can sort of see this in the screenshot I posted.

      Anyway, I figure I need to either upgrade ram or get my GPU involved by going to a newer version.

    • #87545
      David Blatner
      Keymaster

      I doubt it would be better with GPU. The RAM may help.

      I don’t think it is this problem, but this might help: https://creativepro.com/my-grayscale-images-and-colors-changed-suddenly.php

    • #87597
      Lala Lala
      Participant

      David, thanks so much… the transparency blend space setting actually helped.

      I never really messed with it before, but as soon as I switched to RGB blend space,
      the graphics immediately went back to normal.

      Well, all of them except the problematic PNG. It reverted to the pixelated preview,
      and then resolved to a slightly less jagged (but still rough looking) logo after several seconds.

      A strange side effect I noticed is that all my documents with these transparent PNGs,
      will enter an unsaved state after a second (little asterisk next to filename)…
      I get the * even if I made no changes.

      Doesn’t particularly matter or affect anything but it’s odd. Maybe the gradual resolving
      of the graphic counts as a change to the file.

      Anyway I now have a fix, thank you again.

    • #88036
      David Blatner
      Keymaster

      Maybe the asterisk is from updating modified graphics? Or perhaps you’re opening a file in a newer version of the program? It’s hard to know, sorry.

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