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I have simple shapes, wirelines from 3ds Max, that I wish to create a path from. In photoshop, if I select the alpha and create a path from selection, the path is created on the outer edges of the wireline as they're 1 pixel wide.

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Is there a way to create a single path that runs through these lines so I can have one singular path to work with?

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  • I don't think there is in Photoshop. But.. perhaps someone else has a trick. Do you have other tools (software)? Tracing a raster image may be an option.
    – Scott
    Jan 12, 2023 at 22:54

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What you seek is commonly called a centerline trace. My research shows me that nothing exists for Adobe Illustrator and there may be an Inkscape extension or feature which works, but I did not pursue that thread.

I found a video from a creator who uses Silhouette Studio (craft cutter) presenting a similar requirement. The solution provided in the video is an online resource called Rapid Resizer.

It appears that one must begin with a bitmap and select either outline, which you have and do not want, or centerline. It's important to note that centerline trace will not work with T-intersections, but this online resource appears to resolve that by terminating the path short of the intersection. This is apparent in the linked video.

centerline trace screen capture

Above image is a screen capture from the linked video.

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  • illustrator has centerline tracing.
    – joojaa
    Jan 13, 2023 at 6:24

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