About history after a Mirror : seems Move & Sscale work ! (object or points)
Psplit, Extrude of face(s), Bridge of 2 faces of Original don't work for the moment!
For make an history of a mirrored object
- Mirror Object Original
- Select mirrored Object
- History Enable Update
- Modify Original! :)
This is an interesting discussion and I want share my experience in this field, I made a few experiment and I understood how modelling suddiv for nurbs conversion with moi3d.
Project a curve to a complex volume (yet well working for subdive)
Trim
Kill Curve(s)
Join
that all! :)
PS Extrude can't work because face(s) are not in middle of surfaces!
So Copy Move one face(s) then "Bridge" one to one ! Copy / Move Faces can be Multiple!
Flow function can be practical for SUbDIve!
Here a cube was projected on a Sphere...of course as always imagination must be large for predict the result!