[GRASS-user] Need help with volumes in NVIZ

[Suzanne]

Are there any tutorials that show how to display isosurface attributes 
for volumes?  If I select it as a visualization type in the volume 
panel, I get a wire frame, but nothing is displayed.  I have already 
added the volume with the New button.  I can display the volume ok if I 
select slices for visualization type.  Any help would here be appreciated.

Thanks,
Suzanne