Cpk_object [object] [mode] [cleanup]
Make a CPK object out of a molecular object. Specify molecular object name, and the kind of balls (fast or slow), and whether to clean-up an intermediate datablock. On the ESV the fast option generates a rough approximation to a sphere, while the slow option is an excellent sphere. This option uses datablock .cpk_radii to associate ball radii with atom types. Two example files are provided in cpk_radii.o and radii.o, for large and small balls. The option generates a set of drawing instructions in .object_cpk_[object] that can be written out and edited on a standard text editor if necessary. This datablock gets deleted if the default cleanup option is taken.