thank you Cory, I’ve tried your suggestion, but I get the error in the enclosed picture.
On the other side, Idid try “tabletopoints” filter, scaled the color values for the points, and after that a “3Ddelaunay” filter, and then a top a “isovolume” and it works more or less, except the resolution is not fine enough. Please see the enclosed picture:
. Im searching now to a way to improve the resolution, maybe interpolating the values of the grid, and how to better export it as a geometry. Any suggestion is more than welcome.

