From the article:
Sintel was made without commercial 3D software, by a team that lacked commercial experience, and by a director who freely admits that he was a risky choice for the job.
Its production was beset by doubts, logistical difficulties, and a dangerous desire to overreach its own means of production.
And yet, it is a fully realised and highly cinematic work, with a budget that makes it the second most expensive animated film in Dutch history. It is also, at times, quite lovely.
Welcome to the strange and wonderful world of Sintel, the Blender Institute’s latest open movie.