!PARAMETER -in
  !TYPE string
  !BRIEF Input molecule file
  !REQUIRED true
!END
!PARAMETER -out
  !TYPE string
  !BRIEF Output grid file
  !REQUIRED true
!END
!PARAMETER -epsin
  !TYPE float
  !BRIEF Inner dielectric
  !DEFAULT 1.0
  !LEGAL_RANGE 0.0 100.0
!END
!PARAMETER -epsout
  !TYPE float
  !BRIEF Outer dielectric
  !DEFAULT 80.0
  !LEGAL_RANGE 0.0 100.0
!END
!PARAMETER -grid_spacing
  !TYPE float
  !DEFAULT 0.5
  !BRIEF Spacing between grid points (Angstroms)
  !LEGAL_RANGE 0.1 2.0
!END
!PARAMETER -buffer
  !TYPE float
  !DEFAULT 2.0
  !BRIEF Extra buffer outside extents of molecule.
  !LEGAL_RANGE 0.1 10.0
!END
!PARAMETER -mask
  !TYPE bool
  !DEFAULT false
  !BRIEF Mask potential grid by the molecule
!END
