[GRASS-dev] RGB colored and Transparent areas in one vector map

[Nikos Alexandris]

Dear all,

I have an rgb_column with RGBs for a vector map. For some areas, I would
like to have no color, as in trasparent.

If I am not wrong, we can't do that, ie define "nv" as we can do in
color rules for a raster map.

Can we?

I did not test for removing the centroids, from the areas which I want
transparency.  Then again, this isn't the right answer I feel.

Thanks, Nikos