Thanks for all the info. The process
of keeping track of the location of one object
in a union of moving parts that can itself be
positioned most anywhere needs a function
or something. I mean, the render engine has that
info anyway, why not #declare PosHead = vlocation(Head,0)
for the location and #declare NormHead =vlocation(Head,1)
for the normal info for the Head?

Personally, I think being able to "mount" a camera on an object
and letting it get moved as the object gets moved is the best option.

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