[GRASSLIST:9476] How to visualize a volume?

[Stefan Istvan]

Hi List,

I have an ascii file with three dimensional datas:
label | x coord | y coord | z coord | measured value

I imported it with this command:
cat Geo/b-talajszenny-grass.csv|v.in.ascii -z z=4 x=2 y=3
out=tokolBszennyezes3D columns='furasjel varchar(20), x double, y
double, z double, tph double'
It worked fine. Then I set the 3D region:
g.region e=644120 w=643700 s=222600 n=222960 t=102.9 b=90 tbres=1
nsres=1 ewres=1
After that I started an interpolation:
v.vol.rst input=tokolBszennyezes3D wcolumn=tph elev=tokolBszennyezes3D
dmin=0.1
Now I have a "tokolBszennyezes3D" named 3D raster map, but I don't know
how to visualize it. I tried with nviz, but it draws nothing.
I would like to create crossection maps also, but I don't know how.

Thanks for the help in advance,
Istvan