The fix for grow from seeds works very well as well as the additional segmentation script, thank you.
The only issue is that the 3D rendering does not appear to automatically update. Does so if manually forced to refresh. I am using 4.13.0-2021-07-15 r30048 / 550f033.
Quick Q. In our discussion, you mentioned that a second segmentation can be carried local to a specific label. Tried to do it in slicer by limiting threshold to a named mask #, but the change appears to be global. Is there an example how it is done. Ron