Apropos of nothing, the first Doctor debating his momentous decision to flee Gallifrey as finally depicted in "Name of the Doctor". (Susan has not yet arrived.)

I "cheated" and gave the "un-chameleoned" capsule a thin "plinth" or "lip" under the door. It seems to me if the undisguised space/time machine were to materialize upon uneven ground, the door would scrape as it opened and closed.

Sincerely,

Bill

Tempt the Hand of Fate and it'll give you the "finger"!