> Sure, but I think it is important for it to define the scale relative
> to an absolute, agreed-upon scale.
> The goal is to be able to take your teapot, put it on my table next to
> their cup and saucer, and have everything be the right size without any
> user intervention.
Agreed. Given the existance of generalized transformation matrices I think
that the real scale proposal is emminently sensible.
--Mike