I was thinking about when the area limits the fillet that I would like to get curvature on like here.



The left edge would stop your fillet size, But the if you could slide it up then you could get the curvature you wanted.

You already answered, There are also other mechanisms to acheive this surface.

I was just asking as latley I have been filleting models that other packages fail and was hoping for MoI's ability.

Thanks again,
Burr