Disregard the second question....

I do have one other concern.  Given the simple example,

#declare X = 5/100;

sphere {
  <0,1,0>, 1*pow(1 + X, frame_number)
  pigment{color rgb<1.0, 0.0.0.0>}
}

The first frame will have a radius of 1.05.  Is the second frame calculated
using 1.05 * pow(1+X, frame_number) or is it 1.10?  I need the former,
where the increase is based on the the last size.

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