Fillet edge equal to the thickness

Hello when using fillet edge with a radius equal to the thickness, it does not close the shape!

I am French and like many I do not speak English well, I am ashamed! lol
This is a Google translation

Rhino follows the surfaces when filleting; usually with a “rolling ball” tool, so the fillet radius can not fully replace the surface.

A fillet surface is tangent to the two surfaces it follows. When the radius is equal to or larger than the width of one of the surfaces it will follow, then it can not be tangent to a the missing surface, so the command fails.

You certainly can model that surface but FilletEdge or FilletSrf aren’t the commands that will work because of the surface tangency requirement.


sans virus.


Monsieur Eric-Olivier BRUN



547 Le Logis Neuf - 38780 ESTRABLIN

Port +33 (0)6 10 37 21 23
Email :

P Please consider the environment before printing this e-mail / Merci de
penser à l’environnement avant d’imprimer cet e-mail