How can I apply an offset while maintaining the borderline?

[JihoKang24]

hello devs,

1. I am currently using an offset to shrink and expand the mesh, but I have noticed that the position of the border changes in an open mesh. How can I fix the position of the border and expand it?

thank you for your helps

[Grantim]

Hello!

Could you please provide some pictures or files to demonstrate the issue and also desired result?

[JihoKang24]

this is my test result

in this case I use offset Thickening In this case Our goal is maintaining border vertex is not changed and offset run
I have another question how to rebuild maintaining this border vertex thank you for your helps!

[Fedr]

Could you please send us your mesh? And if you can, please send the expected result (e.g. from another software) as well?