SubD extrude face using the gumball fails when single vertex resides on the reflection plane. See images below. File attached. I’m running on 7.0.20154.14355.
I understand this extrude operation creates a potentially weird vertex condition. Is this to be expected? SubD should be able to handle this situation, I would think.
Interesting. If I extrude by typing the command, the face extrudes, however, I don’t get a reflection and the model becomes uneven. Next,If I modify the model in any way, the previously extruded face breaks…but at least becomes symmetrical again.
Upon extruding this face again by using the _ExtrudeSubD command and toggling to SubD Flat Display, you can see that this edge rides right along the reflection plane.