Fillet where 3 lines come together


I’ve been struggling with this already a few times, what is the ideal approach to fillet a situation where 3 edges come together? (example file in att.)

3linesfillet.3dm (361.5 KB)

actually 4 lines. in red.

A combination of FilletSrf, Split, BlendSrf and NetworkSrf will get you to the attached solution.

3linesfillet.3dm (194.1 KB)