Hi Steve, also with your new example the same technique I described earlier of splitting the curve up at some other point will make it offset properly.

I've attached an example here, with the edge split up at one other point. Now you can select the 2 edges and use offset on them and get an expected result in the particular zone where it was previously going crazy.

- Michael

Hi Michael,

>>So as far as I can tell there is nothing wrong with the sweep command there, it was a problem with fillet.<<


I find it strange that after I make the 2 rail sweep in Rhino, the fillet can be made in MOI. There is something not right here.




- Steve

Hi Steve, probably it's some difference in the tangent directions at the ends of the sweep between the Rhino one and the MoI one.

It is possible that Rhino does a better job ensuring that the end tangents on a single closed surface sweep like that are exactly in line with one another.

- Michael

Hi Michael,

I will have to be cautious or avoid these types of closed sweeps in MOI.


- Steve