We’ve been discussing this here…
https://discourse.mcneel.com/t/include-dihedral-angle-with-unroll-surface-command/112854/15
Please share if you find a good solution.
You can use FlipSurface and input Guide geometry so perhaps if you can create a plane on each face that has the Z axis in the direction you want the face normal then you can use the FlipSurface component?
File attached is an experiment, not a solution! Someone on here must know how to do this though!
Aligning Normals Exercise MH.gh (13.6 KB)