You can override the Use Color Table user preference ( File > Settings > User > Preferences ) by creating and setting a configuration variable. If MS_REFCOLORTABLE is defined and set to 1, the reference's color table always is used. If MS_REFCOLORTABLE is defined and set to any value other than 1, the reference's color table never is used. If MS_REFCOLORTABLE is not defined, OpenPlant Modeler uses the user preference to determine whether or not to use the reference's color table.