This looks good - the only thing I would add (which should be fairly easy compared to
the splines)
is to change the interpolation method by which the expressions are morphed. Having
linear
interpolation makes it look as though the mouth is 'boucing' between expressions, so
perhaps cubic
or cosine interpolation would be better.

Alternatively, perhaps the mouth should move exponentially towards new expressions:
currentexpression = firstexpression*e^-nt + secondexpression*(1 - e^-nt)
where t is time and n controls the speed of the fade.

Perhaps also one further thing could be added - a slight and low frequency variation
of the
parameters to avoid the lips looking too fixed when they are not actually being
animated.



-Chris

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