How do i get curvature of a surface without any corners and a sweep curvature between green and red?

how do i get curvature of; a surface without any corners and a sweep.

curvature between green and red?

Hello - if you can post the surfaces that is always better but -
-if the surfaces are not all separate, Explode or use ExtractSrf to get at the surface that is adjacent to the green one.
-MatchSrf for curvature. Set 'Match by closest point' and 'Preserve isocurve direction' in the MatchSrf controls.

Anything good happen?

-Pascal