There is still something that I do not understand.

I have now scaled back the df3 files, using for a defined object Obj:

#local Min   = min_extent(Obj);
#local Max   = max_extent(Obj);
#local Size  = Max-Min;

Superposing the object and the df3 files, flipping the df3 files along y 
(Gilles Tran), and resizing the df3 files, I note the following:

1) the x-axis needs also to be flipped! Visible especially with 
asymmetrical objects (skeleton)
2) the skeleton df3 needs an additional x-axis scale correction: scale 
<-3.0,-1,1>*Size
3) the head df3 needs a /different/ x-axis scale correction: scale 
<-2.3,-1,1>*Size

The two images show orthographic views.

Question: If the df3 are made to a unit-sized box, why does the x-axis 
need a correction different from object to object?

Thomas

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