I've changed background color to blue, and put a circle on it. I also changed the color of the inner part of the circle to white. Now I want to depict seams on it... how can I draw the seams?

I can accept that the seam is just the curved line - i.e. I don't need the dashed line or the "real" seam, which is a collection of small horizontal lines, since I don't like the idea of spending another 10 or even 20 hours just learning about how to draw a "real" seam. Here's the image that I intended to depict, though since I don't know how to depict it in a computational way, I just overlaid a circle on the original circle and erased the redundant part with an eraser by hand, and finally duplicated it and transposed the duplicated line. But since the hand-written curve is quite awful, I want to make the curve look more fluent.

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1 Answer 1


If you want to make the lines in 5 seconds then click on PenTool and on the artboard click once at the upper point - look at the picture below, press Shift and move mouse down (or up if you started at lower border of a ball), then - when you at lower border of a ball click (and don't leave the button) and start dragging the directional line in a direction which will give you a nice arcuate line. Once you've done with arc leave the mouse button and click Escape. Finally, choose the desired width of the stroke and duplicate+mirror the line.


You've done:


  • Hmmm... It looks like this works only sometimes and doesn't always; It instead makes me depict the awkward arc - check out my updated post on the two black lines.
    – Blaszard
    Commented Mar 12, 2014 at 20:52
  • Ok, you dont need create a second arc - you copy and paste the first one and then Flip It Horizontally
    – Ilan
    Commented Mar 12, 2014 at 20:56
  • Another way is to just a straight line (click first point, click second point) then 'grab' the middle of the line and drag it out to make the curve.
    – DA01
    Commented Mar 12, 2014 at 22:06

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