Industrial Light & Magic has been rolling out several videos detailing the work they did for last summer's The Avengers and their latest is how they rebuilt New York City for the film. As you may know, The Avengers was filmed mostly in Cleveland and New Mexico which don't exactly look like New York City. Check out the video below caption and video below:

Although roughly a third of "The Avengers" is set in New York City precious little was actually filmed there. ILM crew members photographed 7-miles of city streets from a variety of heights and at different times of day totaling 250,000 images. The crew then digitally recreated roughly 20 square blocks of mid-town Manhattan using a variety of techniques. Live action shoots were held primarily on sound stages in New Mexico and in the streets of Cleveland.