text: The computer-animated movie was the first to be directly produced in a stereoscopic 3-D format instead of being converted into 3-D after completion , which added $ 15 million to the film 's budget .
simplified: The movie was the first computer animated movie to be directly produced in a stereoscopic 3-D format instead of being changed into 3-D after completion , which added $ 15 million to the film 's budget .