"Gary@internet.UUCP (AMXBR-VLD-V)" <moss@Brl-Vld.ARPA> (11/26/84)
When I wrote my UNIX plot interpreter for a Megatek Whizzard 7250 here at BRL, we decided that the convention (consistent with your your Interpretation (2)) was to scale evenly in x, y, and z (we extended the plot(3X) library to include 3-D and color). I believe that this is also the way the Tektronix support provided with S5 behaves. This allows the user to pass the true minimums and maximums of his plot to the space() command without fear of uneven scaling and seems the most useful and sensible approach. __Moss__