The CASTpyMOL plugin allows for the visualization of surfaces and voids identified from CASTp using pyMOL. For more information see the CASTp Website.
As of 2010, the CASTpyMOL plugin does not appear to be supported by the CASTp group. The plugin is only available as a precompiled .pyc file compiled with an early version of python. Thus a 'bad magic number' error is encountered when attempting to initialize CASTpyMOL_V2 Jedgold 20:56, 10 November 2010 (UTC)