I would like to round up the back part of the insole. So I create a kind of arc and I would like to attract the back part of the insole: The arc in orange on the following picture.
So I tried with a Shrinkwrap Modifier but the result is not good as my arc is not really in 3D:
The idea is to attract gradually (from bottom to top) the back of the insole with the arc...
Do you have any idea?