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scotwllm
scotwllm
Inspiring
January 31, 2022
Answered

Selection Slides Down

  • January 31, 2022
  • 5 replies
  • 1138 views

This is driving me crazy. I've selected this guy's shirt every way I know of, and the selections keep moving down a couple of pixels. You can see it along the top of the shirt. The buttons are great examples because you can see the selection is off by equal amounts at the top and bottom. 

 

Any idea why this happens and how I can fix it?

 

Scott

    This topic has been closed for replies.
    Correct answer scotwllm

    Here is how I ended up resolving this issue. Rather than using selection tools in the main Photoshop window, I do the selection within the Select & Mask interface. I set it to the red overlay, lower the opacity so that I can see what is underneath the overlay. I choose the selection brush (top one), adjust the brush size, and click a few times on what I want to select. Photoshop figures out what I'm trying to select and removes the red overlay. Then I output to a new layer with layer mask. Back on the regular main screen, the selection is exactly where I want it.

    5 replies

    scotwllm
    scotwllmAuthorCorrect answer
    Inspiring
    February 19, 2022

    Here is how I ended up resolving this issue. Rather than using selection tools in the main Photoshop window, I do the selection within the Select & Mask interface. I set it to the red overlay, lower the opacity so that I can see what is underneath the overlay. I choose the selection brush (top one), adjust the brush size, and click a few times on what I want to select. Photoshop figures out what I'm trying to select and removes the red overlay. Then I output to a new layer with layer mask. Back on the regular main screen, the selection is exactly where I want it.

    J E L
    Community Expert
    J E LCommunity Expert
    Community Expert
    February 1, 2022

    @scotwllm Any chance it's because Overscroll is checked on? I was having a similar issue to yours, and turning that off eliminated it.

     

     

      c.pfaffenbichler
      Community Expert
      c.pfaffenbichlerCommunity Expert
      Community Expert
      February 1, 2022

      Can you force the issue again? 

      If so do ruler visibility and/or GPU-usage have any bearing on it? 

      PECourtejoie
      Community Expert
      PECourtejoieCommunity Expert
      Community Expert
      February 1, 2022

      Hello, are you used to zoom in and out using the CMD/Ctrl+Space or ALT+Space?

       

      I'm asking this because you can move a selection as you are drawing it by holding the Spacebar. 

      Therefore, if you hit Space+Alt (listed in sequence they are typed in), and drag before holding ALT or CMD/Ctrl, you might have moved the selection unknowingly.

        scotwllm
        scotwllmAuthor
        Inspiring
        February 1, 2022

        I don't think that could be the reason because I would have had to inadvertently make the same mistake every time I worked on the pic.

         

        Scott

          PECourtejoie
          Community Expert
          PECourtejoieCommunity Expert
          Community Expert
          February 1, 2022

          Could you share the steps of your selection process? Is it Ps 23.1.1? What kind of pointing device are you using?

          When exactly does the selection slide down? 

            Trevor.Dennis
            Community Expert
            Trevor.DennisCommunity Expert
            Community Expert
            February 1, 2022

            Hi Scott

             

            Can you share the same screen shot without the marching ants?

            How did you make the selection?  We can see the Polygonal Lasso too selected, but that does not make sense with the image and selection, so the steps you took to get to this position please?

            Is this after using Select & Mask for instance?

            You are showing 500% zoom ratio.  You need to view at 100% 1:1 to assess anything like this, but it does appear to be exactly what you think it is.

             

            Try disabling Native Canvas in Preferences > Technology Previews.  I think you need toi restart Photoshop to make this take effect.

             

            Try copying the selection to a new layer

            Ctrl click the new layer to reselect it.  Invert the selection. Select the background layer and copy to a new layer again.

            Inspect those new layers with everything else turned off to see if you still have fringe (on the inverted selection copy)

              scotwllm
              scotwllmAuthor
              Inspiring
              February 1, 2022

              Hi Trevor --

               

              I made the initial selection of the shirt with the quick selection tool.  Photoshop couldn't distinguish between the shirt and dark shadow on the model's underarm, so I used the polygonal lasso tool to remove that bit from the shirt selection. I can't remember if I used Select & Mask on that specific instance, but I know I have in the past. I've been fussing with this one since December.. I tend to stay away from Select & Mask because the module runs slowly on my machine. Plus, I usually have to use other methods to get clean edges. My favorite is shift-clicking a brush along an edge. 

               

              I enlarged the pic so you could see what I was talking about. I usually check things out at 200%, and then 100%. Never 500%, though. 

               

              The native canvas was already deactivated. I have no idea what that feature is about, anyway, LOL.

               

              I'm not sure if I followed you correctly in the last paragraphs because of invert vs inverse. What I think you are asking for is to select the shirt and put it on its own layer. Then select everything but the shirt and put it on its own layer. Check for fringing. That's what is reflected in the screengrab attached. You can see the fringing where the shirt and skin meet.

               

              Scott

              c.pfaffenbichler
              Community Expert
              c.pfaffenbichlerCommunity Expert
              Community Expert
              February 1, 2022

              What have you done for all-purpose trouble-shooting so far? 

               

              When you use the Selection as a Layer Mask is it off, too? 

              (Basically I am wondering if the issue might be purely display-related.) 

              Does hiding the Rulers have any effect? 

              Does turning off »Use Graphics Processor« in the Performance Preferences (Photoshop > Preferences > Performance > Graphic Processor Settings) and restarting Photoshop have any bearing on the issue? 

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