Perhaps deform by volume?
This doesn't deal with weight though but can be flexible since you can 
interactively mod the radius on the volume deformers.


Manny Papamanos
Product Support Specialist
Americas Frontline Technical Support


From: [email protected] 
[mailto:[email protected]] On Behalf Of pedro santos
Sent: Monday, January 06, 2014 4:45 PM
To: [email protected]
Subject: Envelopes, Weights, Deformers and setting them up.

Hi
We use Species here for ease and speed. So the head and jaw have their 
deformers, and the facial expressions are done through Shapes on a FaceRig 
panel. For some time now the animator wants some additional Facial controls so 
he isn't restricted by the range of the shapes. And he wants something that 
does not turn into a cumbersome task given the revisions/iterations over an 
asset. I'm fairly new to Softimage and these were the approaches I went about:


Doritos
I had it setup, just one thing that is dragging the process; Envelopes are 
generated by distance but there's always normalization. So if I want them to 
just have a straight spherical falloff into black I can't. Or even to falloff 
into another dummy null weight, I can't. So I had to paint, around the ears, on 
the top of the head and sides, neck, etc. I was trying to minimize paitings so 
iterations on a model's rig can be faster.
I could put an inplicit per Derformer set on Bounding Volume > Limit. But it's 
an abrupt cut off.


Deform by Spine
Creates the falloff I want from the curve. I like the "drawn" deformations it 
does on mouth and eyes. I do an operator per curve, since the combined weights 
of several curves seems wonky. The downside seems to be that I can't transfer 
them with GATOR. How would you come about to transfer Deform by Spine between 
objects to save time?


General Concerns.
I come from Lightwave and Envelopes to me seem to be like a box of weights that 
are usually normalized. I see that deformers like Cage, Spine also generate 
such box of weights, but they don't seem to be handled as envelopes.
How flexible and manipulated can be weights and the underlying connections of 
Softimage between the mesh object, the weight, the control null and the 
deforming operator?? Seems to me that such weights don't exist without the 
deformers.


This 
Image<https://dl.dropboxusercontent.com/u/143766132/Forums/SI-Community/WeightMapsDeform.png>
 illustrates what I'me trying to do.

Cheers
probiner

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