Paul Smith demonstrates mixing shapes in Softimage ICE usig scene parameters in ICE rather than expressions in this simple example of why ICE is much better than traditional shape mixing.

Paul Smith writes: ICE rigging for this kind of deformation is incredibly useful as the next time you want to do this you can just make a head of a new character.. make some shapes with the same naming convention and plug one compound in, and job done. The ability to do this is the kind of thing that makes me an ICE fanatic. Can you imagine how long this would usually take?