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In this thread exercise I stumbled upon a problem where I realized that scaling the middle edge loop outward to create a torus approximation does not work as it is not scaling uniformly. The Shrink/Fatten with Alt+S will work, but it will pinch the geometry when applying Subdivision Modifier.

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So instead of scaling the middle edge loop outward, I wanted to find a workaround and do something that scales the upper and lower outer edge loops inward on only the XY plane, similar to the behavior of the Inset feature.

enter image description here

So I tried Shrink/Fatten, but unlike in the case of the middle edge loop, this will now also scale the Z component. I was wondering if there is a scale similar to the Inset feature that would operate only on the XY plane?

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    $\begingroup$ I've edited my answer because I forgot the most obvious solution :D $\endgroup$ Sep 1, 2023 at 7:51

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//EDIT: Below you will find workarounds, but sorry, I forgot the most obvious. So first of all the solution: If you have the Edit Mesh Tools enabled, just select the top and bottom outer edges and choose Edge > Offset Edges > Move and enter a negative value for Width.

offset edges move

width value

And now for the workarounds if you do not want to use the Edit Mesh Tools for whatever reason:

The first solution that comes to my mind as a workaround would be to bevel the top and bottom edge with one segment, then selecting the beveled inner edges which moved towards the middle edge and press X > Dissolve Edges. Not great, but not too complicated and does the job as a workaround. And you can enter a value if you want an exact distance to move inwards.

bevel edges

dissolve inner edges

But since you mention the Inset feature, why not use that? Select all with A, then deselect the outer face loops by holding Shift+Alt while clicking the vertical edges between them. Afterwards you can dissolve the top and bottom outer edges. Of course you can enter a value here as well.

select all but outer edges

inset faces

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    $\begingroup$ Oh yeah I have the Mesh Edit Tools thing, the Edge Offset pretty useful, thank you very much for sharing Gordon! $\endgroup$ Sep 1, 2023 at 11:12

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