Hi Paolo,

> It works fine in 2D But not in 3D

Yes, it is generally the case that these kinds of tangent constructions only work on objects all in the same plane...

For curves that are all going in different directions in 3D, as far as I can tell there will not likely be any solution to be found for a circle tangent to all 3 3D curves simultaneously.

Maybe I don't understand your situation though, can you please post a model file with some 3D curves in it that you would have expected to work so I can take a look?

> Compliments on this v2 beta update

Thank you!

- Michael