Up: Rendering methods
The `Orbital' representation draws a molecular orbital isosurface
corresponding to a user-defined wavefunction amplitude computed on a
regularly spaced grid, resulting from the selected wavefunction type,
spin, excitation, and orbital index [29,30].
The size parameter controls the thickness of points and line
isosurface representations, and the grid spacing parameter controls
the density of the regular grid upon which the wavefunction amplitude