Polygons > Remove Spikes straightens the surface of a polygon object by detecting and flattening single-point spikes. Use Ctrl-Z to undo.
The controls are:
Parameters group -
Smoothness Level slider (low to high) - a higher setting results in more smoothing.
OK button - saves the polygon object to the Model Manager and closes the dialog.
Cancel button - terminates the dialog without saving the polygon object to the Model Manager.
Apply button - removes spikes and leaves the dialog open for further flattening.