ClearanceCubeUsesTipVector

The value for this registry entry specifies the setting for the ClearanceCube uses Tip Vector for Start/End Face check box on the General tab in the Setup Options dialog box (Edit | Preferences | Setup):

Entry Name: ClearanceCubeUsesTipVector

Entry Type: A whole number that specifies True (1) or False (0). The default value is 1.