You can directly load .dx file and process it in Multiwfn with exactly the same way as .cube file (amply exemplified in Section 4.13 of Multiwfn manual). Multiwfn supports lots of volumetric data formats (.cube, .dx, .grd, CHGCAR, etc.), it is impossible to explicitly provide examples for each of them.

Best,

Tian

Is it possible to obtain a density difference  using the DX data generated with the volmap plugin in VMD?

I tried to find this in te Multiwfn user guide, but I could not.  The user guide seems to support DX format, but I did not find any examples that could provide a way to manipulate the data.

I appreciate any hints on how to do this with Multwfn.

Thanks so much.

Kind regards,

Angelo