Hi Pilou,
> "With SMT Button pressed mesh will be Smoothed then Divided"
Yes - it looks like ZBrush has some kind of bug in the smoothing process, looks like it may have to do with processing polygons that have a high valence vertex in them. That's a vertex that has a large number of edges radiating out from it, which is the case in pole points like that.
Vertices with a high valence can have some difficulties in certain smooth subdivision schemes.
So turning off the smoothing process avoids the problem in ZBrush.
- Michael
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