Can someone point me to a working example of Paint color volume ?
I didnt find any in the help files ..
My experiments didnt yield any working results ..

paintcolorvolume SOP creates volume(you have option to give desire color) based on curve which you can draw freehand on viewport.

It needs geometry to project onto(volume to be drawn) in first input. Other two inputs are optional.

In second input you can feed your own optional vdb volume(no Houdini volume) then this will be used instead of default volume inside asset and Voxel Size under Volume tab will not affect anything. Don't be surprised because it's linked to vdb inside asset. And color of input volume will be used instead.

Third Input volumes to be stamped on drawn curve.

You are feeding inputs in wrong way that causes error.

OK thanks .. I missunderstood the function of this node. I thought that I would be able to paint in a vector field ( RGB )
That would be the function I am after ..