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Inspiring
August 6, 2025
Answered

Shape builder leaves a faint stroke on solid (non-stroke) objects when subtracting

  • August 6, 2025
  • 2 replies
  • 466 views

I'm having an issue with the Shape Builder tool where – no matter what I do, subtracting leaves a faint "stroke" from the object that lies "behind" the merged object. To illustrate this I added a cyan rectangle behind the object which was created with the Shape Builder tool by overlapping a cyan rectangle over the red rectangle and then subtracting the cyan segment.

 

These objects had no stroke and were pure solids. Despite this, I tried expanding the objects and expanding appearance beforehand but nothing seems to work and the faint non-stroke appears anyway. As it is, I can't really use the shape builder tool for anything.

 

Any assistance is greatly appreciated!

Correct answer Vanjazz

In case of the line visible in the cyan area you could try to Unite them with the Pathfinder and set the Pathfinder option to a high precision


Hi Ton!

 

This seemed to the trick when I used the Pathfinder's Unite command to create a compound path – the regular option merges the objects to on color, which is not what I want. I'll try this method on more complex artwork that I'm currently working on and get back to this thread if needed.

 

Many thanks for your assistance, Ton 🙂

2 replies

Jacob Bugge
Community Expert
Community Expert
August 8, 2025

Vanjazz,

 

How about an Opacity Mask, where you change the overlapping rectangle from cyan to black, then select the red one as well and click Make (Opacity) Mask in the Transparency palette flyout?

 

Ton Frederiks
Community Expert
Community Expert
August 6, 2025

Does changing preview from GPU to CPU (Cmd E or Ctrl E) make it disappear?

Is it visible in Outline view?

VanjazzAuthor
Inspiring
August 7, 2025

Hi Ton and many thanks for your quick response!

You are correct – outlines are visible in the Outline view (tried with new shapes). Switching between CPU and GPU previews does not make them disappear, however:



I greatly appreciate your expertise with this issue.

Ton Frederiks
Community Expert
Community Expert
August 7, 2025

In case of the line visible in the cyan area you could try to Unite them with the Pathfinder and set the Pathfinder option to a high precision