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A
adriaanjms
Participant
May 24, 2022
Question

Lower opacity creates strange line

  • May 24, 2022
  • 4 replies
  • 335 views

I'm working with a simple polygon to fill in some negative space and when I lower the opacity this strange line keeps appearing. Both the grey circle and my polygon are set at the same opacity (52%) and set at the color (pure black: 000000). My polygon does not have a stroke, only a fill. Please help me figure out how to get rid of strange line.

 

Attached is a picture of the issue: 

This topic has been closed for replies.

4 replies

Peter Spier
Community Expert
Peter SpierCommunity Expert
Community Expert
May 24, 2022

There are some screen draw issues in InDesign related to GPU acceleration on Mac that look like this. Might be affecting Illustrator as well.

L
Community Expert
LaubenderCommunity Expert
Community Expert
May 24, 2022

Hi adriaanjms,

are you sure that you are posting in the right forum?

It looks like your screenshot is not from InDesign, but from Adobe Illustrator.

 

Regards,
Uwe Laubender
( Adobe Community Professional )

 

    A
    adriaanjmsAuthor
    Participant
    May 24, 2022

    Oh geez, I'm always using InDesign and I messed up this time. 

     

    Willi Adelberger
    Community Expert
    Willi AdelbergerCommunity Expert
    Community Expert
    May 24, 2022
    1. You do not tell us what PDF settings to create a PDF.
    2. You do not tell us, if you activate antialiasing or not in your Acrobat Preferences.

     

    I suppose you are flattening transparency. This will create stitching lines. 

     

    If you place PDFs in InDesign you should use PDF/X-4, never PDF/X-1 or X-3. You can use AI and PDP files also.

      A
      adriaanjmsAuthor
      Participant
      May 24, 2022

      Thank you for your advice. This is my first time asking for advice so I will know to include those in the future.

      Brad @ Roaring Mouse
      Community Expert
      Brad @ Roaring MouseCommunity Expert
      Community Expert
      May 24, 2022

      Hard to tell exactly from your screen grab, but when you overlap two objects with transparency, where they overlap may end up darker. If you unite your shapes, this should go away, but it looks like there's something else at play here. Show us your artwork in Outline.

        A
        adriaanjmsAuthor
        Participant
        May 24, 2022

        Thank you Brad, I will try uniting them. 

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