Dear Sajeewa and other PyMol users,
when you want to explore tunnels computed by CAVER in more detail, you can try a new CAVER Analyst software. It was created by the CAVER development team and provides you with the computation (using CAVER), visualization and interactive exploration of tunnels and cavities. You can download it at http://caver.cz/index.php?sid=199. For illustration of tunnel appearance in CAVER Analyst please see http://www.caver.cz/index.php?sid=128

If you'll have some questions or problems with using it, we will be happy to  guide or assist you. Just contact us at caver@caver.cz.

Thanks!

Barbora Kozlikova
on behalf of the CAVER development team