I've appreciated the many tutorials and forum discussions around using the Flow tool. Now that I know how to use it, I'm struggling to get the precise mapping of a surface on to a (partial) sphere that I want.

If you look at the attached images--4 of the 6 green lines, once mapped to the sphere, are no longer "lines". In addition, if you take a peek at the 3D view, the circular pattern that I map on to the partial sphere does not reach the "bottom" of the partial sphere in all places.

Is there a way to get a more "orthogonal" mapping from the surface to the sphere?

It's the same problem than in this video! ;)

You must first "Flat" the surface for draw your lines on it!

Whoa. Where does that power menu with ShrinkTrimmedSrf come from?

Make sure that you use ShrinkTrimmedSrf on your partial sphere and flatten a copy for your base surface.



Example file attached.

Well, that was a little more frustrating than I'd hoped, but now that I know I can type commands in to the console by pressing Tab, I guess I have a way forward. Thank you all who led me in the right direction!