[GRASSLIST:6361] nviz and resolution of GRASS region

[LJunek at t-online.de]

Dear users,

I visualize a DEM with nviz and wonder if the grid resolution and
polygon resolution refer to the resolution I defined with g.region in
GRASS 6.0?
For example: the resolution in GRASS 6.0 is 90m.
If I define the grid resolution with 1, does this mean 1unit=90m or 1m?

Thanks in advance
Larissa