From the interview:
The production cost for the film has been reported in the entertainment press as being around $20 million. First of all, is that accurate, because it sounds extremely low for a film with this level of production value, and if it is accurate, how were you able to achieve such quality at that price point?The first comment:
Greg Tiernan: Neither Conrad or I can confirm or deny that actual figure, but all I will say is that when Conrad pitched the movie to us, and we made our pact and vow to Conrad, and to Seth and Evan, and eventually to Megan Ellison at Annapurna and to Sony Columbia, we knew damn well that we could deliver a movie that looks like a $150 million movie for a fraction of the cost. That’s about as close as I can get to confirming or denying that figure. In general, that’s the whole reason we started the studio 13 years ago. After working in the L.A. industry for many years, I could see so much money just needlessly thrown down the toilet in making a lot of these movies. It doesn’t have to cost that much money when you’re well organized, and you have your mind set on the goal of what you want to do, and you get the job done with a small, determined crew. But yeah, let’s just say it was a lower budget movie.
The production cost were kept low because Greg would demand people work overtime for free. If you wouldn't work late for free your work would be assigned to someone who would stay late or come in on the weekend. Some artist were even threatened with termination for not staying late to hit a deadline.And the second:
The animation department signed a petition for better treatment and paid overtime. When the letter got to Annapurna they stepped in and saw that artist were payed and fed when overtime was needed.
Over 30 animators left during the coarse of the production due to the stress and expectations. Most of them left before the paid overtime was implemented. This was met with animosity and was taken as a personal insult to the owners. Their names were omitted from the final credits despite working for over a year on this film.
Almost half the animation team was not credited. The team believed in this film and poured their hearts and souls into it. Despite this, more than half of it was not credited. You can see the full team on IMDB, which contains 83 people (and I am certain there are some missing). The film's credits, however, contains 47.