Conversation so far:
Did Terry Gilliam direct The imaginarium?
The Imaginarium of Doctor Parnassus was directed and co-written by Terry Gilliam.
Who did Terry Gilliam co-write with for The Imaginarium of Doctor Parnassu?
The Imaginarium of Doctor Parnassus was co-written by Terry Gilliam and Charles McKeown.

Question: How did Gilliam approach making the film?
Self-contained rewrite: How did Terry Gilliam approach making the film The Imaginarium of Doctor Parnassus?