VistaPro
John,
I kludged up a version of VP3 with DXF which overlaps sub-objects at the edges
as I described before. As I expected, there was no discontinuity at the
intersection of the two objects. I'll email the GIF files to you so you can
see the results. One image has two objects that just butt together — you can
see an obvious line where they meet. The other has the objects overlapping and
the line is gone. Now to put the code in "for real"…
John.