Jo asked about running MT campaigns in a 3-D universe.
I tried once. Space seems just too sparse to get away
with it unless you start to "fudge" jump limitations too
(like pilot X means you add X to the total "hexes" you
can jump).
I rationalize the map as a high distorted, non-representational
view of space. This is what the Imperium looks like to your
jump drive, not your eyes. Then the view is flattened to fit
on paper. (Which is something that makes *no* sense in an
age of holodynamics and virtual reality...)
Richard