Hi Finema,

I did a script called UnwrapCone, which will also unwrap frustrums, which are cones with the top cut off.
Your wine bottle neck is not quite a cone, and likely is not developable (?).


The next problem is the slanted seam, which bows inward from a cone. So I tried adding a line segment from the bottom of the slant seam, to the top of the slant seam, as a substitute slantseam.

(The UnwrapCone result looks very similar to what Karsten has shown.

- Brian
(My initial results were with an overly large unwrap, and the flow result was shrunk down... I'll have to try again... )