Monitor colors

[Morris Trimmer]

GRASSers,
  I am not getting all the colors displaying on the GRASS display 
monitor.  Colormode float only seems to enhance the colors but not 
provide any more colors than does fixed mode. 
  The images I am displaying are scanned photographs that we are 
using v.digit to map on top of.  The colr file in the database shows 
256 categories each with its own unique rgb mix, and yet when I run 
d.colortable many of the 256 colors are the same.
  When the image is displayed similar colors seem to be blended into 
one and this washes out some of the detail needed for mapping.
  Is this a problem with the display monitor (d.mon)?  Is it realy this 
limited in its color display capabilities?  Or am I just missing 
something here?
  The photographs are scanned, saved as tiff, converted to 
sunraster using xv (24 to 8 bit), and imported into GRASS using 
r.in.sunrast.  Both the tiff and sunraster files show all the colors 
when displayed using xv.
   Thanks!
Morris Trimmer
University Computing
Washington & Lee University
Lexington, VA. 24450
trimmer at wlu.edu
(703) 463-8846