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variable: $wsta -- stat error force sphere_morph()
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default: 0.0

The floating point parameter, $wsta ("weight of
stat error"), (F3 panel, lower left) controls the
strength of the tangential 'force' in
sphere_morph() that tries to reduce error between
a real-valued statistic on the moveable and
target surfaces.

Turning this up produces better alignment at the
cost of more distorted surfaces.

See R-click help for "REG" for more details.
