3-D shape with data

[Robert Anthony Canales <rcanales@Stanford.EDU>]

Hello all,
I am in need of some advice on S-PLUS graphics.  I need to illustrate data
on a 3 dimensional object.  This is different from say the typical output
of persp() or wireframe() where there are 2 dimensions that may represent
location and a third that represents some value within the 2 dimensions.
As an example of what I would like think of mapping the terrain of a
geographic region in 3 dimensions but then having different colors on
these 3 dimensions representing population density.  Are there a set of
functions in S-PLUS (or in a library) for this type of representation?

I am working on SPLUS 2000 for the PC.

Thanks,
RC