Multiple authors (Sabrina, David, Stephen) have stated that either the "Create Smoothed Polygon" option does not work or works but is no different from the "Create Polygon Model" result.
I think this is more an issue of stating clearly in the checklist that multiple segmentation masks should be created in neighboring slices to get a clear difference between the "Create Polygon Model" and "Create Smoothed Polygon Model". If only a single segmentation mask is created then the Create Smoothed Polygon does seem to fail.
Steps to reproduce:
- Load 3D image.
- Create segmentation for the image.
- Draw segmentation masks in neighboring slices in a view. (if only a single mask is drawn then "Create Smoothed Polygon Model" is no different for "Create Polygon Model")
- Right click on the segmentation node in the data manager and click on "Create Smoothed Polygon Model"
- A smoothed polygon should be created in the 3D display view.