Fillet where 3 lines come together

Rhino Rhino for Mac
1

Hello,

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.jpg821×611 71.2 KB

3linesfillet.3dm (361.5 KB)

2

actually 4 lines. in red.

3linesfillet2.jpg821×611 75.4 KB

3

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

3linesfillet.3dm (194.1 KB)