On Aug 9, 2013, at 11:55 AM, Elaine Meng <meng@cgl.ucsf.edu> wrote:

(a) use the "coulombic" command (not the GUI, which depends on there being a molecular surface) with the "atoms" option:
<http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/coulombic.html>

FYI, this option to the coulombic command is only available in the daily build.

--Eric

                        Eric Pettersen

                        UCSF Computer Graphics Lab

                        http://www.cgl.ucsf.edu