Hi Pilou, that's nice, but that is not a variable radius fillet that you are showing there.

A variable radius fillet is similar to a regular fillet - it is a new smooth surface that is calculated between 2 existing surfaces, with ensured tangency where the new surface touches the others.

The one you show there is like a sweep - it's not a connection between 2 existing surfaces, and since the output is only polygons there is no kind of tangency in the generated surfaces either...

Here is an example of what a variable radius fillet looks like, the fillet surface is in red:



So note that it is trimming away what used to be a sharp connection between 2 surfaces just like a regular fillet, except that the fillet radius is changing between different values as it travels along the edge.

- Michael