Set a 3D region to estimate

[markm0705]

I would like to set up an irregular 3D region to estimate and simulate within. Would you please provide an example of either setting up a 3D grid using perhaps a 3D tesselation (perhaps a DXF file) or alternatively perhaps some sort of masking grid loaded from an external file (with some flag like 0 to ignore and 1 to estimate). I'm not sure it is possible to estimate over a grid that has irregular extents? It seems possible in some of the 2D examples I've found on the web but not sure how to set this up in 3D, please.

[Fabien Ors]

Dear.
I confirm that RGeostats can build a selection from 2D polygon only.
Masking/Selecting 3D samples of a database from a 3D region must be done using another R package.