Could a TARDIS exterior have transparent glass?

Since a TARDIS is "bigger on the inside", windows pose an issue. How does one look inside of something that is bigger inside?

With a properly functioning chameleon circuit, the exterior of the TARDIS can change into different forms. Could it turn into something that has a window on the side? Could you then see into the TARDIS from the outside? What if the whole ship was a glass cube; how would that look from an external perspective?