NoteYou need to set a Weight
Change Percentage value greater than 0.0 when smoothing
all the vertices on a bound surface.
(Optional) Turn on Preview and
then click Apply to highlight in the scene view
the vertices that will be smoothed by the Smooth Skin Weights operation.
The vertices highlight yellow.
TipIf many vertices
highlight yellow on your character (for example, like in the above
image), then your Weight Change Percentage value
is too low and should be increased.