|This code has been put under version control in the project Pymol-script-repo|
MSMS is an excellent tool for computing protein solvent excluded surface (SES). MSMS Plugin for PyMOL provides a graphical user interface for running MSMS and displaying its results in PyMOL. Most recent MSMS Plugin code can be obtained from this link.
Only works in Linux, since pdb_to_xyzrn is a shell script. Windows users please contact author for a script replacing pdb_to_xyzrn.