The Prune Weights tool
allows you to set weights that are below a certain specified value
to zero. This has the effect of removing small or unneeded weights
and generally cleaning up any weights that you may not want to have
on nodes.
Select
a mesh that has the Muscle deformer applied that you want to prune
weights for.
From
the Weight drop-down list, select
the weight type you want to prune weights for.
Enter
the value you want to prune at. Any weights below this value are
set to 0. For weight types that normalize (such as Sticky weights),
any needed remainders are redistributed to the largest weight.