Wanted: Terrain display program

[Gregg Townsend]

I have some digital terrain data (a regular grid of elevation measurements)
that I'd like to display in perspective under X-windows or NeWS on a Sun, or
in any manner on an SGI Personal Iris.  Can anyone offer a pointer to such a
program?  Something to display a function of two variables would also do the
job.

    Gregg Townsend / Computer Science Dept / Univ of Arizona / Tucson, AZ 85721
    +1 602 621 4325     gmt at cs.arizona.edu     110 57 16 W / 32 13 45 N / +758m