Aren wrote:
I applied that to the raster layer, and it had no effect. The
entire background remains yellow.
if you run the query tool (arrow with a table next to it in the
map display window) , or d.what.rast if using the old Xmonitors,
does it report those areas as NULL or 0?
you can manually reset the colors with the r.colors module, or
Raster -> Manage colors in the menus.
Hamish